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WorksheetsLight Waves Review
Total questions: 41
Worksheet time: 23mins
Why do you not see an image when light reflects off a rough surface?
because not enough light is not reflected
because the reflection is specular
because the reflection is diffuse
because the law of reflection does not apply
The Law of Reflection:
The angle of incidence is _________ the angle of reflection
bigger than
the same as
smaller than
As you look into a flat mirror, where is your image going to form?
A
B
C
D
A beam of light traveling through air hits the surface of a lake. Which of the arrows correctly show what happens to the light beam in water?
A
B
C
D
What happens to the image when you move the candle further away from the lens?
Get smaller and moves toward the lens
Get bigger and moves toward the lens
Get smaller and moves away from the lens
Get bigger and moves away from the lens
No image will appear
What happens to the image when you move the candle to the focal point F1?
Get smaller and moves toward the lens
Get bigger and moves toward the lens
Get smaller and moves away from the lens
Get bigger and moves away from the lens
No image will appear
Light travels at the speed of light, and sound travels at the speed of sound. Both depend on the medium through which they travel. The difference is that in denser media, _______________ slows down but _______________ moves faster.
light; sound
sound; light
Trick question! There is no difference. Neither speed changes, ever!
Lies! They both slow down in denser media
T/F: When light rays move from one medium into another, their speed and wavelength changes but the frequency stays the same
True
False
A beam of light bends when it passes from air into water, and then bends even more when it passes from water into glass. What can you conclude from this fact?
Air is denser than glass
Water is denser than glass
Glass is denser than water
Air is denser than water
What type of stuff can be refracted? Choose the best answer
Light
Sound
Heat
Anything that travels in waves
Why does white light from the sun form a colorful rainbow when it passes through water droplets in the atmosphere?
The droplets of water in the air have different densities
White light diffracts when it encounters water
The colors that make up white light refract at different angles
Different-sized water droplets refract white light at different angles
Can a plane mirror produce a real image?
Yes, the image is real because the place mirror reflects the same image.
Yes, the image is real because the plane mirror can focus light.
No, the image is always virtual because a plane mirror cannot focus light.
No, the image is sometimes virtual depending on the angle of the mirror.
If you multiply the frequency f and wavelength λ of blue light, you get
the speed of light
the speed of blue light
a black hole
If you multiply the frequency f and wavelength λ of x-rays, you get
the speed of light
the speed of x-rays
a picture of your bones
If you multiply the frequency f and wavelength λ of radio waves, you get
the speed of light
the speed of radio waves
better radio signal
Which part of the EM spectrum is used in night vision goggles?
X-ray
Near-Infrared
Microwave
Visible
Lasers are very focused beams of light, so they travel at the speed of light (3x108 m/s). Astronomers use this to point lasers at reflective mirrors that were left on the Moon in 1969 by the Apollo 11 Mission. How can astronomers use this setup to measure the distance between the Earth and the Moon? (The picture is not an actual answer option, I just thought it looked pretty cool.)
They time how long it takes the laser to hit the Moon and then multiply that time by the speed of light.
They time how long it takes the laser to bounce back from the Moon, divide that time by 2 and then multiply it by the speed of light.
They time how long it takes the laser to bounce back from the Moon, divide that time by 2 and then divide the speed of light by that time.
