Light Unit C - Lesson 2 ????

Multiple Choice

What is the definition of white light?

• Light that is only visible in the dark
• Light that contains only red and blue wavelengths
• A mixture of all visible wavelengths of light

• Light that is produced by artificial sources only

Multiple Choice

If a scientist wanted to separate white light into its component colors, what tool should they use?

• A compass

• A prism

• A telescope

• A magnifying glass

Multiple Choice

Why do we see different colors when looking at objects in sunlight?

• Sunlight contains only primary colors, and objects absorb the rest

• Objects change color based on the temperature of the sunlight

• Colors are illusions created by the brain, independent of light

• Sunlight, or white light, is a mixture of all colors, and objects reflect certain wavelengths

Multiple Choice

Which statement best explains how white light and colors are related?

• White light is a combination of all visible wavelengths, and objects absorb and reflect specific wavelengths.

• White light is the same as black light, containing no colors.
• White light is a single wavelength that does not interact with objects.
• White light is made up of only primary colors, which cannot create other colors.

Multiple Choice

A student claims that without sunlight, objects would still appear in full color. How would you evaluate this claim?

• The student is correct because colors exist independently of light.
• The student is incorrect because colors are determined by the temperature of the object.
• The student is partially correct because all objects emit light in darkness.
• The student is incorrect because objects only appear colored when light reflects off of them.

Multiple Choice

What happens to the colors of light that are not reflected by an object?

• They create heat and energy
• They are scattered in all directions
• They are transformed into sound waves
• They are absorbed by the object

Multiple Choice

Why does a tomato appear red in sunlight?

• It absorbs all colors and reflects red light
• It reflects green light and absorbs red light
• It changes color based on the time of day
• It reflects red light and absorbs all other colors

Multiple Choice

If a person shines blue light on a red tomato, what color would the tomato likely appear?

• Black or dark
• Yellow
• Green
• Purple

Multiple Choice

Which of the following best explains why some people perceive colors differently?

• Some people’s brains create colors that do not exist

• Atoms inside an object change depending on who looks at them

• Colors appear different because they are constantly changing

• Some people’s eyes process photons differently than others

Multiple Choice

A scientist claims that colorblindness occurs because some people’s eyes do not detect certain photons correctly. How would you assess this statement?

• The scientist is correct because colorblindness is caused by a lack of light in the environment
• The scientist is correct because colors are perceived based on how photons are processed by the eyes

• The scientist is incorrect because color perception is solely determined by brain processing
• The scientist is partially correct because colorblindness is only a result of aging effects on the eyes

Multiple Choice

What is refraction?

• The scattering of light in all directions

• The slowing down of light in a vacuum

• The bending of light as it passes through a material

• The splitting of light into different colors

Multiple Choice

Which of the following statements explains why light bends when passing through glass?

Light slows down when it enters a different material, causing it to change direction
Glass absorbs some colors of light and reflects the rest
Light speeds up when it touches the surface of glass
Light stops moving inside the glass and restarts when it exits

Answer: A) Light slows down when it enters a different material, causing it to change direction

• Glass refracts light only at night
• Light bends more sharply in water than in glass
• A Light slows down when it enters a different material, causing it to change direction

• Light travels faster in glass than in air

Multiple Choice

Which of the following materials would most likely cause light to refract instead of being fully reflected or absorbed?

• A glass of water

• A plastic bottle
• A sheet of paper
• A piece of metal

Multiple Choice

A student is conducting an experiment with different materials. When a flashlight shines on a smooth metal surface, the light bounces straight back. What type of light interaction is occurring?

• Polarization
• Reflection
• Transmission
• Diffraction

Multiple Choice

A teacher places a clear plastic ruler in a cup of water, and students notice that the ruler looks bent at the water's surface. How would you assess this observation?

• The ruler is bent because it is made of flexible material
• The ruler appears bent due to the color of the water
• The ruler is distorted because of the temperature of the water
• The ruler appears bent because the light passing from water to air is refracted

Multiple Choice

Which material is one of the best at reflecting light?

• Wood

• Mirrors

• White paint

• Glass

Multiple Choice

Why does a shallow pond reflect more light than the ocean?

• The ocean is always deeper than a pond
• A pond has more surface area than the ocean
• Ocean water is colder than pond water
• A shallow pond allows less light to be absorbed than deep water

Multiple Choice

If you were going for a walk on a hot, sunny day, which type of clothing would keep you the coolest?

• A dark blue jacket
• A white t-shirt

• A black t-shirt
• A gray sweater

Multiple Choice

Which statement best explains why metal objects feel hotter in the sun compared to wooden objects?

• Metal cools down faster than wood
• Wood reflects more sunlight than metal
• Metal absorbs more light energy, increasing its temperature

• Metal has a lower thermal conductivity than wood

Multiple Choice

A scientist claims that a perfect mirror does not absorb or refract any light. How would you assess this statement?

• The scientist is correct because mirrors can also emit light
• The scientist is partially correct because mirrors only reflect visible light
• The scientist is correct because a perfect mirror reflects all light without loss
• The scientist is incorrect because perfect mirrors do not exist

• Observing fluorescent dyes

• Improving the brightness of phosphorescent materials

• Curing plastics

• Attracting insects

• Promoting melanin production (tanning) in skin

• Illuminating artwork

• Revealing human blood, urine and semen at crime scenes

• Sanitation

• Pet stain detection and pest control

• Counterfeit detection and ID verification

• Antique and art inspection

• Observing fluorescent dyes

• Improving the brightness of phosphorescent materials

• Curing plastics

• Attracting insects

• Promoting melanin production (tanning) in skin

• Illuminating artwork

• Revealing human blood, urine and semen at crime scenes

• Sanitation

• Pet stain detection and pest control

• Counterfeit detection and ID verification

• Antique and art inspection

Multiple Choice

Which material refracts light the most, making it appear sparkly?

• Plastic
• Glass
• Diamond
• Wood

Multiple Choice

Why do high-quality glass windows allow almost all light to pass through?

• They are made of a special material that blocks light
• They allow light to refract, bending as it passes through

• They are tinted to reduce brightness
• They are designed to trap light inside them

Multiple Choice

A jeweler is testing a gemstone to determine if it is a real diamond. What property should they examine?

• How much the gemstone refracts light

• How colorful the gemstone appears
• How easily the gemstone scratches
• How brightly the gemstone shines

Multiple Choice

A student notices that some windows create glare while others do not. What is the most likely reason for this difference?

• Lower-quality glass is more transparent than high-quality glass
• High-quality glass is thicker than lower-quality glass
• All windows are made from the same type of glass
• High-quality glass refracts more light, while lower-quality glass reflects more light

Multiple Choice

A scientist claims that diamonds sparkle because they reflect light better than any other material. How would you assess this statement?

• The scientist is incorrect because diamonds sparkle due to refraction, not reflection

• Diamonds sparkle due to their color and not their light interaction
• The scientist is correct because diamonds emit light on their own
• Diamonds sparkle because they are the hardest known material

Multiple Choice

What is the transmission of light?

• The emission of light from a source
• The movement of light rays through a material

• The creation of shadows by blocking light
• The scattering of light in different directions

Multiple Choice

Which of the following best explains why opaque materials do not allow light to pass through?

• They allow some light to pass through but not all
• Their molecules are packed so closely together that light cannot pass through
• They emit light that interferes with incoming light
• They are made of transparent materials

Multiple Choice

Which of the following materials would best be described as translucent?

• A wooden door
• A clear glass window
• A sheet of cardboard
• A frosted glass window

Multiple Choice

A student places three objects in front of a light source:

• Object A: Allows almost all the light through with no distortion.

• Object B: Allows some light through but blurs the image.

• Object C: Blocks all light from passing through.

How should the student classify these objects?

• Object A is opaque, Object B is transparent, Object C is translucent
• Object A is translucent, Object B is transparent, Object C is opaque
• Object A is opaque, Object B is translucent, Object C is transparent
• Object A is transparent, Object B is translucent, Object C is opaque

Multiple Choice

A manufacturer wants to design car windows that allow passengers to see outside but also provide some privacy. Based on your understanding of light transmission, which type of material should they use?

• Clear plastic
• Frosted glass
• Translucent tinted glass

• Colored acrylic

Multiple Choice

Which of the following is the best definition of a transparent material?

• A material that emits light
• A material that scatters all light
• A material that is completely opaque
• A material that allows light to pass through completely

Multiple Choice

Why can we see objects clearly through transparent materials?

• The material allows all light to pass through without significant scattering

• The material blocks some light, making objects appear clearer

• The material absorbs light and prevents it from bouncing away

• The material bends and distorts light so we can see better

Multiple Choice

A student is choosing a material for a window in their house. Which of the following materials should they select if they want to see outside clearly?

• Clear plastic

• Cardboard
• Opaque plastic
• Tinted glass

Multiple Choice

A scientist shines a flashlight through four different materials and records the following observations:

• Material A: Light passes through completely, and objects behind it are clearly visible.

• Material B: Some light passes through, but objects appear blurry.

• Material C: No light passes through at all.

• Material D: Light reflects off the surface.

Which material should be classified as transparent?

• Material A
• Material B
• Material C
• Material D

Multiple Choice

A company wants to create water bottles that allow people to easily see how much water is left inside. Which material would be the best choice?

• Colored plastic
• Insulated metal
• Clear glass or clear plastic
• Thick ceramic

Multiple Choice

Which of the following is an example of a translucent material?

• C) Wax paper
• D) Cardboard
• B) Stained glass
• A) Plastic wrap

Multiple Choice

Why can we only partially see through translucent materials?

• They reflect light like a mirror, making objects behind them invisible

• They allow some light to pass through, but scatter the light in different directions

• They absorb all the light that passes through them

• They bend light so much that objects appear completely distorted

Multiple Choice

A student wants to reduce glare on their windows while still allowing some sunlight to enter. Which material would be the best choice?

• B) Frosted glass
• A) Clear glass
• C) Metal sheet
• D) Cardboard

Multiple Choice

A teacher places three objects in front of a flashlight and observes:

• Object A: No light passes through

• Object B: Some light passes through, but the object behind is blurry

• Object C: Light passes through completely, showing a clear image

How should the teacher classify these materials?

• Object A is transparent, Object B is translucent, Object C is opaque
• Object A is opaque, Object B is transparent, Object C is translucent
• Object A is translucent, Object B is opaque, Object C is transparent
• Object A is opaque, Object B is translucent, Object C is transparent

Multiple Choice

A company is designing packaging for a product and wants customers to see only a blurry outline of the item inside. What type of material should they use?

• Translucent plastic

• Frosted metal
• Opaque plastic
• Clear glass

Multiple Choice

What is refraction?

• B) The bending of light as it moves through different transparent substances
• G) The increase in speed of light in a vacuum
• F) The change in color of light when it passes through a prism
• E) The creation of light from a source

Multiple Choice

Why does light refract when it enters a different transparent substance?

• The light waves change speed, causing the direction to change

• The new substance has a higher density, causing light to scatter

• The light changes color when entering a new medium

• The light waves are blocked by the new substance

Multiple Choice

A student places a pencil in a glass of water and notices that the pencil looks bent at the water’s surface. What causes this effect?

• The water creates a shadow that makes the pencil look bent
• The light waves slow down when moving from air to water, bending the light rays
• The pencil is actually broken and appears bent in the water
• The pencil is made of a special material that changes shape in water

Multiple Choice

Which of the following best describes what happens when light travels from water into air?

• The light slows down and reflects back into the water
• The light travels in a straight line without any change
• The light is scattered in all directions by the air
• The light speeds up, changing its direction

Multiple Choice

A student claims that light will always travel in a straight line unless something blocks it. Based on your understanding of refraction, how would you evaluate this claim?

• The claim is incorrect because light bends when it moves between different transparent substances

• The claim is partially correct because light bends only in water.
• The claim is correct because light always travels in curves.
• The claim is incorrect because light can only travel through air.

Multiple Choice

What is the refracted ray?

• The light ray that is reflected off a mirror
• The light ray that travels in a straight line
• The light ray that is scattered in all directions
• The light ray that bends as it enters a new transparent substance

Multiple Choice

Why does light change direction when moving from air into water?

• The light travels faster in water, causing it to bend
• The light decreases speed, causing it to bend
• The light is scattered by the water molecules
• The light passes straight through without bending

Multiple Choice

A scientist shines a laser beam into a tank of water at different angles. Which of the following situations will result in no refraction?

The laser enters the water at an angle
The laser enters the water straight on (perpendicular)
The laser enters from an opaque object
The laser beam is completely absorbed by the water

**Answer: B) The laser enters the water straight on (perpendicular)

Explanation: When light hits a new substance straight on, it does not bend but still changes speed.

• The laser enters the water at a steep angle
• The laser enters the water straight on (perpendicular)

• The laser is reflected off the surface of the water
• The laser beam splits into multiple beams

Multiple Choice

Which of the following factors affects how much light bends when moving between two transparent substances?

• The angle at which the light enters the new substance
• The size of the light source
• The temperature of the substance
• The speed of the light ray

Multiple Choice

A student claims that a stronger refraction will occur if the light enters at a greater angle. How would you assess this claim?

• The claim is correct because light bends less when it enters at a greater angle
• The claim is incorrect because light only bends in a straight line
• The claim is partially correct because light bends only in water
• The claim is correct because light bends more when it enters at a greater angle

Multiple Choice

Which substance in the table has the highest refractive index?

• Glass

• Water

• Air

• Diamond

Multiple Choice

What happens to light as it enters a substance with a higher refractive index?

It speeds up and bends away from the normal line
It slows down and bends towards the normal line
It continues in a straight line with no bending
It reflects back into the original substance

Answer: B) It slows down and bends towards the normal line

• It slows down and bends towards the normal line
• It speeds up and bends away from the normal line
• It continues in a straight line with no bending
• It reflects back into the original substance

Multiple Choice

A scientist shines a laser into glass (refractive index 1.5) and then into water (refractive index 1.33). In which substance will light bend more?

• Light will bend more in glass
• Light will bend equally in both substances
• Light will bend less in glass
• Light will bend more in air

Multiple Choice

Based on the table, which of the following best explains why diamond has the smallest angle of refraction (8.2°)?

• Diamond has a higher refractive index than water, causing less bending
• Diamond reflects all light, resulting in no refraction
• Diamond's structure prevents any light from passing through
• Diamond slows light down the most, making it bend more

Multiple Choice

A student claims that water bends light more than glass. Based on the refractive indices in the table, how would you assess this claim?

• The claim is incorrect because glass has a higher refractive index than water
• The claim is correct because glass bends light more than water
• The claim is incorrect because glass does not bend light at all
• The claim is partially correct because glass and water have the same refractive index

Dropdown

A higher refractive index means the light slows down

Select answer

Dropdown

A higher refractive index means the light will change direction more​

Select answer

Dropdown

When light travels through air into a diamond, it speeds up​

Select answer

Dropdown

When light travels through a diamond into water, it speeds up​

Select answer

Dropdown

If light went through glass into water, it would bend towards the normal line​

Select answer

Multiple Choice

What is an optical illusion?

• When we see something differently than what actually exists

• A phenomenon where shadows disappear
• An effect that causes objects to move
• A trick that makes colors appear brighter

Multiple Choice

Why do optical illusions happen?

• The brain misinterprets the signals it receives from the eyes

• The retina enhances the signals received from the eyes

• Light bends so much that objects become invisible

• The eye reflects light correctly, making objects look clear

Multiple Choice

A student looks at an image where two lines appear to be different lengths, but when measured, they are actually the same. What causes this effect?

• The image is distorted by the medium it is displayed on

• The eyes perceive colors differently under varying light conditions

• The brain relies solely on the size of the lines for interpretation

• The brain misinterprets visual information based on previous experience

Multiple Choice

Which part of the nervous system is responsible for interpreting what we see and sometimes creating optical illusions?

• Pupil
• Brain
• Iris
• Cornea

Multiple Choice

A scientist claims that everyone perceives optical illusions the same way. How would you assess this claim?

• The claim is incorrect because optical illusions are only visual tricks without brain involvement
• The claim is incorrect because different people’s brains may interpret images differently
• The claim is partially correct because some people are immune to optical illusions
• The claim is correct because everyone sees optical illusions the same way

Multiple Choice

What type of optical illusion is this?

Cognitive illusion

Physiological illusion

Literal illusion

• Cognitive illusion
• Physiological illusion

• Literal illusion

Multiple Choice

What type of optical illusion is this?

Cognitive illusion

Physiological illusion

Literal illusion

• Cognitive illusion

• Physiological illusion

• Literal illusion

Multiple Choice

What type of optical illusion is this?

Cognitive illusion

Physiological illusion

Literal illusion

• Cognitive illusion

• Physiological illusion

• Literal illusion

Multiple Choice

What type of optical illusion is this?

Cognitive illusion

Physiological illusion

Literal illusion

• Cognitive illusion

• Physiological illusion

• Literal illusion

Open Ended

What is a mirage?

Open Ended

 Why do mirages form?

Open Ended

Why do mirages form in deserts?

Open Ended

Why do rainbows form?

Open Ended

Why are rainbows curved?