Bennett Mechanical Test Acoustics and Optics 3

Question 1

Why can't sound travel through outer space?

Accepted Answer

There is no medium to carry it

Answer

Space is too cold

Answer

Light blocks it

Answer

There is no gravity

Question 2

A concave (diverging) lens causes parallel light rays to:

Accepted Answer

Spread apart

Answer

Converge to a point

Answer

Stop completely

Answer

Reflect backward

Question 3

The pitch of a guitar string rises when the string is made:

Accepted Answer

Shorter and tighter

Answer

Longer and looser

Answer

Thicker

Answer

Heavier

Question 4

White light passing through a prism separates into colors because each color:

Accepted Answer

Bends by a different amount

Answer

Travels at the same speed

Answer

Has the same wavelength

Answer

Reflects equally

Question 5

A material that absorbs sound well, like foam, is used to:

Accepted Answer

Reduce echoes

Answer

Amplify sound

Answer

Increase pitch

Answer

Reflect light

Question 6

The bending of light around the edge of an obstacle is called:

Accepted Answer

Diffraction

Answer

Reflection

Answer

Absorption

Answer

Refraction

Question 7

Which color of visible light has the longest wavelength?

Accepted Answer

Red

Answer

Blue

Answer

Violet

Answer

Green