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Test Unit 7 Light

Total questions: 35

Worksheet time: 26mins

Name
Class
Date
1.

The speed of light is about ________ in vaccum

a)

3x108 Km/s

b)

3x108 m/s

c)

3x108 mi/s

d)

None of these

2.

Which wavelength of visible light has the lowest energy?

a)
Red
b)
Yellow
c)
Orange
d)
Blue
3.
Why does an apple appear red?
a)
All colors are absorbed & none are reflected
b)
All colors are absorbed except for blue, which is reflected
c)
All colors are reflected and none are absorbed
d)
All colors are absorbed except for red, which is reflected
4.

What is the distance between one peak and the next in a wave called?

a)

Frequency

b)

Amplitude

c)

Wavelength

d)

None of these

5.

Which of the following types of radiation has the shortest wavelength and the highest frequency?

a)
Radio Waves
b)
Infrared
c)
Visible
d)
X-Rays
6.

Which of these is NOT correct about light?

a)

Light travels in a straight line.

b)

The speed of light is the fastest in the entire universe.

c)

Light bends while changing the medium through which it is passing

d)

Light can pass through all objects

7.
What are the two main TYPES of waves?
a)
Ocean and Sound
b)
Electromagnetic and Mechanical
c)
Light and Color
d)
Transverse and Longitudinal
8.
The back and forth (or side to side motion of a wave) is called...
a)
Transverse wave
b)
Longitudinal wave
c)
Sound wave
d)
Electromagnetic wave
9.
The wave with the least amount of energy is what from the electromagnetic spectrum?
a)
Radio
b)
Microwave
c)
Infrared
d)
Gamma
10.
When light bounces back it is called...
a)
Reflection
b)
Transmission
c)
Refraction
d)
Absorption
11.
When light bends due to a change in speed it is...
a)
Reflected
b)
Transmitted
c)
Absorbed
d)
Refracted
12.
When an object takes in light it is...
a)
Reflected
b)
Transmitted
c)
Absorbed
d)
Refracted
13.
What is the purpose of waves?
a)
To bring us fun in the ocean
b)
To carry matter
c)
To carry energy
d)
To move
14.
When a wave can pass through matter AND empty space, what type of wave is it?
a)
Mechanical
b)
Sound wave
c)
Electromagnetic
d)
Space wave
15.
When a wave can only pass through matter, what type of wave is it?
a)
Light wave
b)
Mechanical wave
c)
Electromagnetic wave
d)
Matter wave
16.
Which portion of the electromagnetic spectrum includes the entire range of light that can be detected by the human eye? 
a)
ultraviolet light
b)
visible light
c)
infrared light
d)
x-rays
17.
If the wavelength of an electromagnetic wave is longer, what is true about the energy? 
a)
Energy is higher.
b)
Energy is lower. 
c)
Energy is not dependent on wavelength. 
18.
Which part of the electromagnetic spectrum has high enough energy to cause damage to eyes and skin, and sometimes even cancer? 
a)
infrared light
b)
visible light
c)
ultraviolet light
d)
microwaves
19.
Which is the correct order of waves of the electromagnetic spectrum, from lowest energy to highest energy? 
a)
radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays, gamma rays
b)
gamma rays, x-rays, ultraviolet light, visible light, infrared light, microwaves, radio waves
20.
Cancer can be treated with_______________waves.
a)
Penicillin
b)
Radio
c)
Infrared
d)
Gamma
21.
_____ have the longest wavelengths and lowest frequencies of all electromagnetic waves.
a)
microwaves
b)
radio waves
c)
gamma rays
d)
ultraviolet
22.
This type of EM wave shows a break in bones.
a)
gamma ray
b)
x-ray
c)
brokenometer
d)
radio wave
23.
________ is an EM wave that has the LEAST energy.
a)
radio
b)
gamma rays
c)
microwaves
d)
visible light
24.
EM waves used to broadcast television signals
a)
radio waves
b)
infrared
c)
gamma rays
d)
x rays
25.
The entire electromagnetic spectrum is divided into regions by
a)
color
b)
speed
c)
wavelength
d)
the way they are used
26.
White light is the entire range of
a)
colors of visible light combined.
b)
ultraviolet light.
c)
gamma rays and X rays.
d)
EM waves.
27.
Which color of light has the longest wavelength?
a)
orange
b)
red
c)
blue
d)
green
28.
Which electromagnetic waves have the highest frequencies and the shortest wavelengths?
a)
microwaves
b)
visible light
c)
gamma rays
29.
Which electromagnetic waves are used in devices such as heat lamps & TV remote controls?
a)
ultraviolet rays
b)
microwaves
c)
infrared rays
30.
If a light ray is shown on a plane mirror with an angle of incidence of 45 degrees, what is the angle of reflection?
a)
15
b)
30
c)
45
d)
90
31.
Why does green grass look green?
a)
It reflects all colors except green.
b)
It absorbs all colors except green.
c)
It only absorbs green.
d)
The colors mix to make green.
32.

Which color has the shortest wavelength?

a)

Red

b)

Orange

c)

Green

d)

Violet

33.
A pencil appearing to bend when it is immersed in a glass of water is an example of...
a)
Reflection
b)
Rarefaction
c)
Refraction
d)
Reconstruction
34.

In a vacuum radio waves, visible light and gamma rays all have the same ________.

a)

frequency

b)

energy

c)

wavelength

d)

speed

35.

How to draw a reflection ray of light?

a)

draw a line perpendicular to the reflect surface and go through the point which the light meet the surface

b)

put the arrow on the reflection ray to indicate the direction

c)

draw an angle have the same measure of the incident line

d)

all the above

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