Quiz about 7th_light_quizziz

Question 1

Light is a form of energy.

Accepted Answer

True

Answer

False

Question 2

Light travels

Accepted Answer

in a straight line (transverse waves)

Answer

around corners

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in loops, like a slinky (longitudinal waves)

Question 3

Light bounces when it strikes a smooth and/or lustrous surface

Accepted Answer

reflected

Answer

absorbed

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refracted

Question 4

Light bends when it is

Accepted Answer

refracted

Answer

reflected

Answer

absorbed

Question 5

Can be used to identify heat signatures of people lost in the wilderness

Accepted Answer

Infrared

Answer

Radio

Answer

Microwaves

Answer

Ultraviolet (UV)

Answer

X-Rays

Question 6

Can be used to send communications, videos, and music short range (local areas) or long range (to space)

Accepted Answer

Radio

Answer

Infrared

Answer

Microwaves

Answer

Ultraviolet (UV)

Answer

X-Rays

Question 7

Used to cook with

Accepted Answer

Microwaves

Answer

Infrared

Answer

Radio

Answer

Ultraviolet (UV)

Answer

X-Rays

Question 8

Sunlight, tanning beds, plant lights

Accepted Answer

Ultraviolet (UV)

Answer

Infrared

Answer

Radio

Answer

Microwaves

Answer

X-Rays

Question 9

Used to "see" inside the body, for instance to tell if a bone is broken

Accepted Answer

X-Rays

Answer

Infrared

Answer

Radio

Answer

Microwaves

Answer

Ultraviolet (UV)

Question 10

Which of these types of light have the highest energy?

Accepted Answer

Violet

Answer

Red

Answer

Yellow

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Blue

Question 11

Which of these types of light have the lowest energy?

Accepted Answer

Red

Answer

Yellow

Answer

Blue

Answer

Violet

Question 12

Which waves have the highest energy?

Accepted Answer

Gamma Ray

Answer

Infrared

Answer

Visible Light

Answer

Radio

Question 13

Light travels in straight lines until reflected by another object. Which illustration best shows the light being reflected?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 14

Which illustration best shows light being refracted?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 15

Which object refracted the laser beam?

Accepted Answer

Glass marble

Answer

Silver locket

Answer

Picture frame

Answer

Notebook

Question 16

Which of the following is demonstrated when light bounces off mirrors or shiny surfaces?

Accepted Answer

Reflection

Answer

Scattering

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Refraction

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Absorption

Question 17

Which of these provides the best explanation for why the pencil appears broken?

Accepted Answer

Light rays are bent by the water in the glass.

Answer

The pencil absorbs the light rays that hit it.

Answer

Water reflects light rays away from the pencil.

Answer

The surface of the water reflects the light rays.

Question 18

The two kinds of reflection are:

Accepted Answer

regular and diffuse.

Answer

transparent and translucent.

Answer

opaque and translucent.

Question 19

What happens to light after it hits a mirror?

Accepted Answer

It bounces off the mirror.

Answer

It goes through the mirror and bend.

Answer

It goes straight through the mirror.

Answer

It goes around the mirror.

Question 20

What type of surface best reflects light?

Accepted Answer

Shiny

Answer

Dull

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Clear

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Black

Question 21

What is the main source of light?

Accepted Answer

Sun

Answer

Light bulbs

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Candles

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Fluorescent lights

Question 22

The ray of light that strikes a reflecting surface is called ________.

Accepted Answer

incident ray

Answer

reflected ray

Answer

normal ray

Answer

none of the above

Question 23

The imaginary line perpendicular to a reflecting surface is called _____.

Accepted Answer

normal line

Answer

crooked line

Answer

parallel line

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angular line

Question 24

Why is the spectrum of light seperated into its components of colour when white light is directed to a prism?

Accepted Answer

The different colours in the white light bend towards the normal line at different angles when entering prism

Answer

The different colours in the white light bend away from the normal line at different angles when entering prism

Answer

The different colours in the white light bend away from the normal at same speed to each other when entering prism

Answer

The different colours in the white light bend towards the normal at same speed to each other when entering prism

Question 25

This is the example of dispersion of light

Accepted Answer

rainbow

Answer

sky looks bright orange in the evening

Answer

shadow

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Pool seems shallower

Question 26

These are all colours of spectrum except

Accepted Answer

purple

Answer

indigo

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blue

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green

Question 27

Why is red light is at the top whileviolet at the bottom of the spectrum?

Accepted Answer

Red light has the highest speed so it is refracted the least.

Answer

Violet light has the medium speed so it is refracted the least.

Answer

Violet light has the highest speed so it is refracted the least

Answer

Red light has the slowest speed so it is refracted the least

Question 28

As you look at a rainbow, the colors go from top to bottom in what order?

Accepted Answer

ROYGBIV

Answer

VIBGYOR

Answer

GYORVIB

Answer

pretty to beautiful

Question 29

If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface

Accepted Answer

45

Answer

90

Answer

180

Answer

none of the above

Question 30

Light travels in straight lines until it is bent by changing mediums. Which illustration best shows the light being refracted?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 31

The full spectrum of light energy is called the__________

Accepted Answer

electromagnetic spectrum

Answer

broad spectrum

Answer

helium spectrum

Answer

natural light spectrum

Question 32

When a light ray strikes a smooth, flat surface, what is the relationship between the angle of incidence and the angle of reflection?

Accepted Answer

They are equal.

Answer

The angle of incidence is twice that of the angle of reflection.

Answer

The angle of reflection is twice that of the angle of incidence.

Answer

They combine to add up to 180^o.

Question 33

In this diagram, which is the angle of incidence?

Accepted Answer

Angle B

Answer

Angle A

Answer

Angle C

Answer

Angle D

Question 34

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

Accepted Answer

It contains mirrors that reflect the object.

Answer

It magnifies small objects so they can be seen.

Answer

It bends the light rays passing through it.

Answer

It separates the light into different colors.

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