Light: Properties, Sources, and Applications | Interactive Quizzes

Question 1

Which of these does NOT produce its own light?

Accepted Answer

A mirror

Answer

The Sun

Answer

A light bulb

Answer

A candle flame

Question 2

Design an experiment to find out how different materials affect the speed of light passing through them.

Accepted Answer

Use a laser pointer to measure how long it takes for light to travel through different materials of different thicknesses.

Answer

Shine a torch through different materials and measure how bright the light is on the other side.

Answer

Use a prism to separate white light into different colors and measure how far each color travels through a certain material.

Answer

Measure how long it takes for a shadow to appear on a screen when a light source is turned on and off.

Question 3

How do the frequency and wavelength of light relate?

Accepted Answer

Higher frequency means shorter wavelength.

Answer

Higher frequency means longer wavelength.

Answer

Frequency and wavelength are unrelated.

Question 4

When a light source is moved further away from an opaque object, what happens to the shadow of the object?

Accepted Answer

It becomes larger and less sharp.

Answer

It becomes smaller and less sharp.

Answer

It stays the same size and sharpness.

Question 5

Scientists have discovered that light can act like both a wave and a particle. This is called wave-particle duality. What does this tell us about the nature of light?

Accepted Answer

Light has characteristics of both waves and particles.

Answer

Light is made up of tiny particles called photons.

Answer

Light changes its behavior depending on how it is observed.

Question 6

Which of these shows diffuse reflection?

Accepted Answer

Light scattering from a piece of paper

Answer

Light bouncing off a mirror

Answer

Light bending when it enters water

Answer

Light being absorbed by a black object

Question 7

Which of these events happened first in the history of lighting?

Accepted Answer

People started using candles for lighting

Answer

People invented the electric light bulb

Answer

People invented the gas lamp

Answer

People invented the LED light bulb

Question 8

Which of these is an outdated technology for sending light signals over long distances?

Accepted Answer

Smoke signals

Answer

Lasers

Answer

Optical fibers

Answer

Radio waves

Question 9

What are the applications of ultraviolet (UV) light in the medical field and for security purposes?

Accepted Answer

Medical: Sterilizing equipment and treating skin conditions; Security: Detecting counterfeit money

Answer

Medical: Healing wounds; Security: Enhancing night vision

Answer

Medical: Taking X-rays; Security: Analyzing blood samples

Question 10

What is chromatic aberration, and how does it impact the clarity of images formed by a lens?

Accepted Answer

Chromatic aberration is a flaw that makes images blurry or distorted because different colors of light are focused at different points.

Answer

Chromatic aberration is a type of lens distortion that makes straight lines appear curved or bent.

Answer

Chromatic aberration is a benefit of lenses that allows them to create images with better color contrast.

Answer

Chromatic aberration only happens in very large or powerful lenses.

Question 11

Which of the following is a property of light?

Accepted Answer

It can travel through space without the need for a medium.

Answer

It has mass.

Answer

It is a solid object.

Answer

It is a gas.

Question 12

What happens when light strikes a mirror?

Accepted Answer

It bounces off the mirror.

Answer

It is absorbed by the mirror.

Answer

It is bent as it passes through the mirror.

Answer

It is scattered in all directions.

Question 13

Which of the following materials allows light to pass through it but scatters the light?

Accepted Answer

Paper

Answer

Glass

Answer

Water

Answer

Air

Question 14

How does a prism work?

Accepted Answer

It bends light as it passes through the prism.

Answer

It reflects light as it strikes the prism.

Answer

It absorbs light as it passes through the prism.

Answer

It scatters light as it passes through the prism.

Question 15

Which of the following is a natural source of light?

Accepted Answer

The sun

Answer

A light bulb

Answer

A laser

Answer

A candle

Question 16

How does light help us see?

Accepted Answer

Light bounces off objects and enters our eyes, allowing us to see them.

Answer

Light passes through objects and enters our eyes, allowing us to see them.

Answer

Light creates images in our brains, allowing us to see.

Answer

Light reflects off our eyes and enters objects, allowing us to see them.

Question 17

How fast does light travel?

Accepted Answer

186,000 miles per second

Answer

1,000 miles per hour

Answer

100 feet per second

Answer

1 kilometer per second

Question 18

What is the difference between a transparent and a translucent material?

Accepted Answer

Transparent materials allow light to pass through them clearly, while translucent materials scatter light.

Answer

Transparent materials allow light to pass through them, but not as clearly as translucent materials.

Answer

Translucent materials allow light to pass through them clearly, while transparent materials scatter light.

Answer

Transparent materials do not allow light to pass through them, while translucent materials do.

Question 19

Which of the following materials is not transparent?

Accepted Answer

Wood

Answer

Glass

Answer

Water

Answer

Clear plastic

Question 20

What is the main source of natural light on Earth?

Accepted Answer

The sun

Answer

The moon

Answer

Artificial lights

Answer

Stars

Question 21

Which of the following is not a use of light?

Accepted Answer

To heat food

Answer

To see objects

Answer

To communicate

Answer

To make plants grow

Question 22

What is the process called when light changes direction when it passes from one medium to another?

Accepted Answer

Refraction

Answer

Reflection

Answer

Dispersion

Answer

Absorption

Question 23

Which of the following colors of light has the shortest wavelength?

Accepted Answer

Violet

Answer

Red

Answer

Green

Answer

Blue

Question 24

Which of the following is a natural source of light?

Accepted Answer

Firefly

Answer

Candle

Answer

Light bulb

Answer

Flashlight

Question 25

What is the name of the process when light changes direction as it passes from one medium to another?

Accepted Answer

Refraction

Answer

Diffraction

Answer

Reflection

Answer

Interference

Question 26

When light bounces off a smooth surface, what happens?

Accepted Answer

It is reflected back in the same direction.

Answer

It is absorbed into the surface.

Answer

It is bent as it passes through the surface.

Answer

It disappears completely.

Question 27

Which of these materials allows the most light to pass through?

Accepted Answer

Glass

Answer

Wood

Answer

Metal

Answer

Paper

Question 28

Why do we see a shadow?

Accepted Answer

Light is blocked by an object.

Answer

Light is reflected off an object.

Answer

Light is bent as it passes by an object.

Answer

Light is absorbed by an object.

Question 29

What does a prism do to light?

Accepted Answer

It bends light rays.

Answer

It reflects light rays.

Answer

It absorbs light rays.

Answer

It diffracts light rays

Question 30

What happens when light hits a surface at an angle?

Accepted Answer

It can be partially reflected and partially refracted

Answer

It is always reflected

Answer

It is always refracted

Answer

It is always absorbed

Question 31

Which material allows light to pass through clearly?

Accepted Answer

Glass

Answer

Wood

Answer

Metal

Question 32

What is the main source of light for us on Earth?

Accepted Answer

Sun

Answer

Moon

Answer

Stars

Question 33

Which colour of visible light has the longest wavelength?

Accepted Answer

Red

Answer

Blue

Answer

Yellow

Answer

Green

Question 34

Which material absorbs light well?

Accepted Answer

Black paint

Answer

White paper

Answer

Clear glass

Question 35

Which is NOT a safety rule when working with lasers?

Accepted Answer

Look directly at the laser beam

Answer

Never point the laser at a reflective surface

Answer

Always wear safety goggles

Answer

Use the laser in a well-ventilated area

Question 36

When light encounters a surface, what are the possible interactions that can occur?

Accepted Answer

Both reflection and refraction

Answer

Reflection only

Answer

Refraction only

Answer

Neither reflection nor refraction

Question 37

Which of the following materials allows light to pass through it clearly, enabling us to see objects behind it?

Accepted Answer

Glass

Answer

Wood

Answer

Metal

Answer

Paper

Question 38

What happens to light as it travels from one transparent material to another, such as from air to water?

Accepted Answer

Its direction changes

Answer

Its speed remains the same

Answer

Its color alters

Answer

It stops moving

Question 39

Which of the following sources of light is created by humans and not naturally occurring?

Accepted Answer

A light bulb

Answer

The sun

Answer

A campfire

Answer

The moon

Question 40

How does light typically travel in space?

Accepted Answer

In straight lines

Answer

In circular paths

Answer

In zigzag patterns

Answer

Randomly in all directions

Question 41

What is the key difference between reflection and refraction of light?

Accepted Answer

Reflection involves light bouncing off a surface, while refraction involves light passing through a surface.

Answer

Reflection involves light passing through a surface, while refraction involves light bouncing off a surface.

Answer

Reflection and refraction are the same phenomenon.

Answer

Neither of the above statements is correct.

Question 42

Which of the following objects is commonly shaped like a triangle and used to demonstrate the phenomenon of refraction?

Accepted Answer

A prism

Answer

A sphere

Answer

A cube

Answer

A cylinder

Question 43

What happens to light when it passes through a prism?

Accepted Answer

It is bent

Answer

It is absorbed

Answer

It is reflected

Answer

It remains unchanged

Question 44

Which color of visible light has the longest wavelength?

Accepted Answer

Red

Answer

Orange

Answer

Yellow

Answer

Blue

Question 45

Which of the following is not a natural source of light?

Accepted Answer

A mirror

Answer

The Sun

Answer

A candle

Answer

A lightning bolt

Question 46

Which of the following materials is transparent?

Accepted Answer

Glass

Answer

Wood

Answer

Cardboard

Answer

Metal

Question 47

What happens when sunlight passes through a glass prism?

Accepted Answer

It is refracted and dispersed into a rainbow.

Answer

It is reflected.

Answer

It is absorbed.

Answer

It is scattered.

Question 48

Which of the following is an example of reflection of light?

Accepted Answer

Seeing your face in a mirror

Answer

Seeing a rainbow

Answer

Seeing stars at night

Answer

Seeing the sun through a window

Question 49

What is the approximate speed of light in a vacuum?

Accepted Answer

300,000 kilometers per second

Answer

300,000 miles per hour

Answer

186,000 miles per second

Answer

186,000 kilometers per hour

Question 50

Transparent materials allow light to pass through them, while opaque materials:

Accepted Answer

Do not allow light to pass through them.

Answer

Allow light to pass through them but scatter it.

Answer

Allow light to pass through them but absorb some of it.

Answer

Reflect all the light that hits them.

Question 51

What is the main source of light on Earth?

Accepted Answer

The sun

Answer

The moon

Answer

The stars

Answer

Fire

Question 52

When light hits a smooth surface, what happens to it?

Accepted Answer

It is reflected.

Answer

It is absorbed.

Answer

It is transmitted.

Answer

It is refracted.

Question 53

Which of the following materials allows light to pass through it?

Accepted Answer

Glass

Answer

Wood

Answer

Metal

Answer

Rubber

Question 54

What is the change in direction of light as it passes from one medium to another called?

Accepted Answer

Refraction

Answer

Reflection

Answer

Absorption

Answer

Transmission

Question 55

What is the term for when light energy is taken in by an object?

Accepted Answer

Absorption

Answer

Reflection

Answer

Refraction

Answer

Transmission

Question 56

How is a shadow formed?

Accepted Answer

When light is blocked.

Answer

When light is reflected.

Answer

When light is transmitted.

Answer

When light is refracted.

Question 57

Which colour of light is least absorbed by water?

Accepted Answer

Blue

Answer

Red

Answer

Green

Answer

Yellow

Question 58

Which of these techniques does NOT use light?

Accepted Answer

Imaging using sound waves

Answer

Creating 3D images

Answer

Enlarging tiny objects

Answer

Analyzing the composition of materials

Question 59

When light travels from air into water, what happens to its path?

Accepted Answer

It bends.

Answer

It bounces back.

Answer

It disappears.

Question 60

How does light enable us to see through windows?

Accepted Answer

Refraction

Answer

Reflection

Answer

Absorption

Answer

Dispersion

Question 61

Which material allows light to pass through it most easily?

Accepted Answer

Glass

Answer

Wood

Answer

Metal

Answer

Fabric

Question 62

Why do sunglasses often have polarized lenses?

Accepted Answer

To reduce glare from flat surfaces like water or car hoods.

Answer

To make objects seem closer.

Answer

To block harmful UV rays.

Answer

To make colors look brighter.

Question 63

Which material is most reflective?

Accepted Answer

Metal

Answer

Wood

Answer

Paper

Answer

Fabric

Question 64

Which item is a natural source of light?

Accepted Answer

The Sun

Answer

A light bulb

Answer

A torch

Answer

A laser pointer