Light Quiz

Light is _____________.

• moving matter
• reflected radiation
• radiant energy
• invisible colors

Which is NOT true about how light moves?

• It moves in waves.
• It moves at the same speed as sound.
• It can move through the nothingness of space.
• It moves as packets of energy called photons.

Read this sentence: I can see sunlight through the translucent clouds, but I can't see the Sun itself. What does the word translucent mean in this sentence?

• clear
• allowing some light through
• allowing no light through
• colorful

Which of these is a natural light source?

• incandescent lightbulbs
• stars in the night sky

How does light behave when it hits an opaque surface?

• It is absorbed or reflected.
• Some light passes through.
• It refracts or bends.
• It passes through in a straight line.

What affects the shadow an object will make?

• the angle of the light source
• how near or far the light source is
• whether the object is opaque, translucent, or transparent
• all of the above

Light rays refract in a glass of water because ___________________.

• light moves at different speeds through different materials
• light bounces off a smooth surface at the same angle at which it strikes it
• light moves in a curved path
• the light moves the water from side to side

Read this sentence: The speed of light can change depending on the medium through which it passes. Which word means about the same thing as medium?

• water
• spectrum
• substance
• radiation

We see color because ___________________.

• objects reflect the colors we see
• objects absorb the colors we don't see
• objects with color have pigments
• all of the above

Which is true about the human eye?

• The lens and retina help focus light.
• The pupil and iris control how much light enters the eye.
• Neither A or B
• Both A and B