Light as a Wave & Particle

Drag and Drop

The difference between a ray and a beam is that a ray is ​ ​

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while a beam is ​

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the direction of the path taken by light

a is a stream of light energy represented by a num

Match

Match the beam with their correct names.

Parallel

Converging

Diverging

• Parallel

• Converging

• Diverging

Match

Match the following.

• They emit their own light and can be found in nature

• They emit light and are made by humans

• They emit or give off light

• They are lit by luminous bodies

Natural Light Source

Artificial Light Sources

Luminous bodies

Illuminated bodies

• Natural Light Source

• Artificial Light Sources

• Luminous bodies

• Illuminated bodies

Multiple Choice

Identify the source of light.

LIGHTNING

• Natural

• Artificial

Multiple Choice

Identify the source of light.

LIGHTBULB

• Natural

• Artificial

Multiple Choice

Identify the type of light source:

MOON

• Luminous

• Illuminated.

Multiple Choice

Identify the type of light source:

STARS

• Luminous

• Illuminated.

Draw

Draw the path of light showing change in speed but no refraction.

Math Response

Suppose a light ray is incident upon a piece of glass of refractive index 1.52 at an angle of 60°, what is the angle of refraction?

Show formula.

Note: Reverse of sin is also known as arcsin.

Type answer here

Correct Answer: \arcsin\left(\sin\left(60\right)\div1.52\right)=34.73

Deg^°

Rad

Multiple Choice

When a mirage is formed, what are the two mediums that light passes through which results in light being refracted?

• Hot air and cold air

• Air and raindrops

• Air and water

• Air and prism

Multiple Choice

When a rainbow is formed, what are the two mediums that light passes through which results in light being refracted?

• Hot air and cold air

• Air and raindrops

• Air and water

• Air and prism

Multiple Choice

The following are applications of light refraction EXCEPT

• telescope

• eyeglasses

• mirrors

• microscope

Dropdown

Photon is also called ​

Select answer

. It is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all ​

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.

Photons are always in ​

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and, in a vacuum, travel at a constant speed to all observers of ​

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. This is commonly referred to as the speed of light, denoted by the letter ​

Select answer

.

Match

In Einstein’s light quantum theory, E = hf.

What is...

• E

• f

• h

• Planck’s constant value

energy of a photon

oscillation frequency

Planck’s constant

6.626×10^-34 J·s

• energy of a photon

• oscillation frequency

• Planck’s constant

• 6.626×10^-34 J·s

Multiple Choice

Which of the following has the highest frequency?

• Radiowaves

• Light bulb

• X-rays

• Gamma rays

Multiple Choice

Which of the following has the lowest wavelength?

• Radiowaves

• Light bulb

• X-rays

• Microwaves

Multiple Choice

What color has the longest wavelength?

• Red

• Yellow

• Green

• Blue

Multiple Choice

What color has the lowest frequency?

• Red

• Yellow

• Green

• Blue

Drag and Drop

The ​

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of photons is the height of their oscillation ​frequency , and the ​

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of the light corresponds to the number of photons

Drag these tiles and drop them in the correct blank above

energy

intensity

Multiple Choice

Which of the following statement is TRUE about light?

• It acts as a wave and a particle all the time

• It can sometimes act as a wave

• Sometimes it is a wave, other time it is a particle.

• It is only a wave.

Multiple Choice

TRUE of FALSE.

Photons have rest energy.

• True

• False

Multiple Choice

TRUE of FALSE.

Photons have no electrical charge.

• True

• False

Multiple Choice

Photons energy is dependent on its

• frequency

• wavelength

• speed

• Planck's constant

Multiple Choice

TRUE of FALSE.

Like energy, photons cannot be created nor destroyed.

• True

• False

Multiple Choice

TRUE of FALSE.

Other electromagnetic waves like radio waves and UV also have photons.

• True

• False