Light, Sound, Waves Review

Electromagnetic waves are produced by 

• Earth's magnetic field
• static electricity
• the vibration of iron filings
• the vibration of an electric field and a magnetic field together

As light waves pass through openings in a barrier or around the edges of an object, the waves change direction or 

• are absorbed
• diffract
• reflect
• refract

Prisms produce the colors of the rainbow through

• reflection
• refraction
• diffraction
• interference

Green plants look green because they

• transmit green light and absorb the rest
• reflect green wavelengths of the visible spectrum and absorb the rest
• absorb green wavelengths of the visible spectrum and reflect the rest
• reflect blue and yellow wavelengths of the visible spectrum and absorb the rest

Why does the human eye observe the different colors of the rainbow?

• White light is broken down in the eye into separate colors.
• Different colors of light travel at different speeds of the eye.
• The eye sees different wavelengths of light as different colors.
• The eye sees different colors of light in different locations of the eye.

Black is the absence of light. Why does the fur and pupils of a black cat appear black to us?

• There is no light in the room where the cat is located.
• The fur and pupils of the cat reflect all the light waves back to our eyes.
• The fur and pupils of the cat absorb all of the light waves so our eyes detect black.
• The fur and pupils of the cat only reflect the black wavelength of light back to our eyes.

What happens to the colors that are NOT transmitted through transparent or translucent objects?

• The colors are absorbed.
• The colors are refracted.
• The colors are reflected. 
• The colors are transmitted.

Through which medium does a light wave travel the fastest?

• solid
• liquid
• gas
• The medium does not affect the speed of the wave.

What kind of lens is this?

• plane
• divergent
• convex
• concave

When all light is reflected off an object, the object appears

• opaque
• transparent
• black
• white