WorksheetsLight 2021
Total questions: 63
Worksheet time: 1hrs 10mins
Name
Class
Date
1.
Which of the following electromagnetic waves has the longest wavelength?
a)
Infrared Waves
b)
Ultraviolet Rays
c)
Visible Light
d)
Gamma Rays
2.
Which of the following waves in the electromagnetic spectrum has the highest energy?
a)
Radio Waves
b)
Ultraviolet Rays
c)
Gamma Rays
d)
Infrared Waves
3.
As wavelength decreases in the electromagnetic spectrum the frequency _____.
a)
decreases
b)
stays the same
c)
increases
d)
doubles
4.
Which color of light in the visible light spectrum has the most energy?
a)
Red
b)
Yellow
c)
Violet
d)
Green
5.
Which type of electromagnetic waves is used to image bone?
a)
Gamma Rays
b)
UV Rays
c)
X-Rays
d)
B-Rays
6.
Waves with the longest wavelength have the ____ frequency.
a)
lowest
b)
higest
7.
A material that reflects or absorbs all of the light that strikes it is called which of the following?
a)
Transparent
b)
Translucent
c)
Diffuse
d)
Opaque
8.
Objects that allow only some light to pass through them are considered __________.
a)
A. transparent
b)
B. translucent
c)
C. opaque
d)
D. solid
9.
Tracing paper is an example for _______ object.
a)
A. a transparent
b)
B. a translucent
c)
C. an opaque
d)
D. a luminous
10.
Light is a form of energy produced by a ______.
a)
A. luminous object
b)
B. transparent object
c)
C. illuminated object
d)
D. opaque object
11.
An example for an illuminated object is ___________.
a)
A. a candle
b)
B. the sun
c)
C. an electric bulb
d)
D. the moon
12.
According to the laws of reflection, if i = angle of incidence and r = angle of reflection,
a)
A. i = r
b)
B. i > r
c)
C. r > i
d)
D. i is not equal to r
13.
Which of the following is the speed of light?
a)
A. 3 metres per second
b)
B. 30 metres per second
c)
C. 300 metres per second
d)
D. 300 000 000 metres per second
14.
What is the incident ray?
a)
The ray of light leaving the mirror
b)
The ray of light approaching the mirror
15.
A light ray that bounces off of the mirror is known as
a)
Incident ray
b)
Reflected ray
c)
Normal line
d)
Source ray
16.
Where is the angle of incidence located?
a)
Between the mirror and the incident ray
b)
Between the mirror and the reflected ray
c)
Between the normal line and incident ray
d)
Between the normal line and reflected ray
17.
Where is the angle of reflection located?
a)
Between the mirror and the incident ray
b)
Between the mirror and the reflected ray
c)
Between the normal line and incident ray
d)
Between the normal line and reflected ray
18.
What is the name of the perpendicular line that we use to measure angles?
a)
Incident ray
b)
Reflected ray
c)
Normal line
d)
Source ray
19.
Angles are always measured from the:
a)
Boundary
b)
Normal
c)
Incident Ray
d)
Reflected Ray
20.
You can calculate the speed of light using this formula.
a)
c = fλ
b)
c = λ/f
c)
c = f/λ
21.
Electromagnetic waves
a)
need a medium to travel through
b)
can travel through a vacuum.
c)
Are longitudinal.
22.
It takes about _______ for light to reach earth from the sun.
a)
90 minutes
b)
60 minutes
c)
8 minutes
d)
2 minutes
23.
The speed of light in air is
a)
much faster than the speed of sound.
b)
about the same as the speed of sound.
c)
much slower than the speed of sound.
24.
a measure of how much a light ray bends when it enters that medium
a)
index of refraction
b)
reflection
c)
thermogram
d)
mirage
25.
Which is the angle of refraction?
a)
Angle 1
b)
Angle 2
26.
Speed of light in a vacuum is
a)
represented by the symbol "c"
b)
3.00 X108 m/s
c)
both answers are correct
27.
Light has the highest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
28.
Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
29.
How does light behave as it enters these mediums?
a)
continue its path as straight line.
b)
bends toward the normal
c)
bends away from the normal
d)
reflects
30.
A material or substance that a matter wave travels through is ________
a)
a block
b)
a wall
c)
a medium
d)
an electromagnetic spectrum
31.
Glass has a _____________ index of refraction than air.
a)
Equal
b)
Greater
c)
Less
d)
Impossible to say
32.
Light waves need matter to travel.
a)
True
b)
False
33.
The index of refraction for a material is the ratio of the speed of light in a vacuum to the speed of light in a material.
a)
true
b)
false
34.
Critical angle is the angle of incidence that produces an angle of refraction at......
a)
180 degrees
b)
90 degrees
c)
20 degrees
d)
120 degrees
35.
Total internal reflection is the complete reflection of a light ray back into its original medium.
a)
true
b)
false
36.
Materials that have small critical angles are likely to cause most of the light entering them to be totally internally ____________
a)
reflected
b)
refracted
c)
faster
d)
slower
37.
What is the index of refraction of a material if light travels 2x108m/s in it?
a)
6
b)
1.5
c)
0.67
d)
1.67
38.
The formula to calculate the refractive index is
a)
n=cv
b)
n=v/c
c)
n=c/v
d)
v=nc
39.
What is the index of refraction of a refractive liquid if the angle of incidence in the air is 35 degrees and the angle of refraction is 14 degrees?
a)
1.33
b)
2.21
c)
2.37
d)
1.72
40.
Light travels at 1.76 EE 8 m/s through an optical medium. What is the medium?
diamond n=2.45
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
diamond n=2.45
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
a)
Crown Glass
b)
Barium Glass
c)
Flint Glass
d)
Diamond
41.
Which images are opaque?
a)
A & C
b)
A,C,E, & F
c)
D, E, & F
d)
A & E
42.
Material that allows light to pass through allowing you to see "clearly" to the other side.
a)
opaque
b)
translucent
c)
transparent
43.
Why does an apple look red?
a)
because it absorbs red light and reflects white light
b)
because it absorbs red light waves and reflects the others
c)
because it absorbs all colors of light
d)
because it reflects red light waves and absorbs the others
44.
White light is made up of all of the colors of the rainbow
a)
True
b)
False
45.
Black absorbs all light.
a)
True
b)
False
46.
What color of light do you get by combining red, green, and blue light?
a)
Black Light
b)
White Light
c)
Ultraviolet Light
d)
Infrared Light
47.
What color is produced when mixing cyan, yellow, and magenta inks (pigments).
a)
White
b)
Black
c)
Blue
d)
Green
48.
What are the three primary colors of light?
a)
Red, Green, Blue
b)
Green, Yellow, Blue
c)
Cyan, Magenta Yellow
d)
Cyan, Magenta, Black
49.
What are the three secondary colors of light?
a)
Red, Green, Blue
b)
Green, Yellow, Blue
c)
Cyan, Magenta, Yellow
d)
Magenta, Yellow, Black
50.
When the three primary colors mix they produce?
a)
Red, Green, Blue
b)
Black
c)
White
d)
Magenta, Yellow, Cyan
51.
When do you use the RGB (red, green, blue) system?
a)
Printing
b)
Painting
c)
Cell Phone screens
52.
A blue shirt looks blue because...
a)
it absorbs blue and reflects all the colors
b)
it reflects blue and absorbs all the other colors
c)
it absorbs cyan and reflects all the other colors
d)
it reflects cyan and absorbs all the other colors
53.
What kind of light is sunlight?
a)
White Light
b)
Infrared Light
c)
Yellow Light
d)
Red Light
54.
Light is a form of _________.
a)
sound
b)
heat
c)
energy
d)
color
55.
What is the correct order of the colors of the rainbow?
a)
Red, Yellow, Orange, Blue, Indigo, Violet
b)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
c)
Yellow, Orange, Red, Green, Blue, Violet, Indigo
56.
When a pencil is put into a glass of water, it appears to be broken? Why does the pencil look broken?
a)
because the shiny glass reflects light
b)
because the water separates light into many colors
c)
because the part of the pencil outside the water casts a shadow
d)
because light rays are bent when they pass from air into water
57.
Why does a banana look yellow?
a)
it reflects yellow wavelengths of light and absorbs most other wavelengths
b)
it absorbs yellow wavelengths of light and reflects most other wavelengths
58.
When you see the color black...
a)
All colors are reflecting
b)
All colors are absorbed
c)
The color blacl is reflecting
d)
the color black is absorbed
59.
Different colors of light correspond to different light:
a)
Wavelengths
b)
Intensities
c)
Amplitudes
d)
Velocities
60.
A shadow is created by the....
a)
absence of light.
b)
absence of waves.
c)
absence of color.
d)
blocking of sound.
61.
The smallest bundle of light is called
a)
a proton
b)
a phase
c)
a photon
d)
a bundle
62.
the Sun is an example of a(n)
a)
illuminated object
b)
luminous object
c)
translucent object
d)
transparent object
63.
Photoreceptors that detect Color
a)
Cones
b)
Rods
100 %
