Light Waves Notes 25 26

Open Ended

What interactions can waves undergo?

Multiple Choice

What is the relationship between the angle of incidence and the angle of reflection as shown in the diagram?

• The angle of incidence is greater than the angle of reflection

• The angle of incidence is equal to the angle of reflection

• The angle of incidence is less than the angle of reflection

• There is no relationship between the angles

Multiple Choice

If light is traveling from air to water with an angle of INCIDENCE of 40 degrees, what is the angle of refraction? (n=1 air, n=1.33 water)

...How do you solve: (1)(sin40) = (1.33)(sinƟ)

• 48 degrees

• 2.07 degrees

• 11.9 degrees

• 28.9 degrees

Multiple Choice

What is the term used to describe the bending of waves around a barrier or through an opening?

• Reflection

• Refraction

• Diffraction

• Absorption

Categorize

Options (8)

Sun

Cell phone screen

Glow in the dark stars

Sun beads

Crystal paper

Laser

Desk lamp

Campfire

Organize these options into the right categories down below:

LIGHT SOURCES

NON-LIGHT SOURCES

Categorize

Options (6)

Light travels in transverse waves.

Light travels in compression waves.

Light can only travel through a medium.

Light can travel without a medium.

Light is a form of radiant energy.

Light is a form of thermal energy.

Organize these options into the right categories

True

False

Multiple Choice

What makes it possible to see an object when looking through a periscope?

• It contains mirrors that reflect the object.

• It magnifies small objects so they can be seen.

• It absorbs the light rays passing through it.

• It separates the light into different colors.

Multiple Choice

What is bioluminescence?

• Light produced by living organisms

• Light produced by non-living organisms

• Light produced by chemical reactions

• Light produced by electrical sources

Multiple Choice

What are electromagnetic waves and how do they travel?

• They require a medium to travel

• They do not require a medium to travel

• They can only travel through solids

• They travel faster in water

Multiple Choice

What happens to light when it passes from air into water?

• It stops.

• It bends.

• It disappears.

• It changes to sound.

Multiple Choice

What is the distance from the Earth to the Sun?

• 150 million km

• 93 million miles

• 1 million km

• 1 billion km

Multiple Choice

How long does it take for light to travel from the sun to Earth?

• 5.3 minutes

• 6.3 minutes

• 7.3 minutes

• 8.3 minutes

Multiple Choice

When light goes from water into diamond, the speed of the light...

• slows down

• stays the same

• speeds up

Open Ended

SHORT ANSWER: How is it possible for light to change matter? Include evidence from our simulations in your answer and use the vocabulary terms light, energy, and absorb.

Simulation Examples: Plants, genetic material, glass window, & solar panel.

Multiple Choice

When light strikes an object you can’t see through, it reflects some light and absorbs some light.

Reflected light bounces off the medium (object). When light is absorbed, the object takes in the light. White surfaces reflect more light than black surfaces. Shiny surfaces reflect more light than dull surfaces.

Which medium reflects the most light?

• a black sweater

• a shiny piece of metal

• a dark wood table

• a piece of cardboard

Open Ended

Why do you feel warmer when you wear a black shirt vs. wearing a white shirt?

Multiple Choice

What is the effect of wearing a black shirt compared to a white shirt in terms of light absorption?

• A black shirt absorbs all wavelengths of light

• A white shirt absorbs all wavelengths of light

• Both shirts absorb the same amount of light

• Neither shirt absorbs any light

Multiple Choice

What can be inferred about the color of a car and its heat absorption on a hot day?

• Dark colors absorb more heat

• Light colors absorb more heat

• All colors absorb the same amount of heat

• Color has no effect on heat absorption

Multiple Choice

A ray of light is incident towards a plane mirror at an angle of 30-degrees with the mirror surface. What will be the angle of reflection?

• 60^o

• 30^o

• 90^o

• 45^o