Waves Summary Questions

How is light and sound similar? Choose all that apply.

• They both transfer energy.

• They are both waves.

• They both have particles moving perpendicular to direction of wave.

• They can both travel through empty space (vacuum).

Light refraction is the bending of light using different density mediums.

Can sound be refracted?

• Yes

• No

Which way will the sound bend?

• Upwards

• Downwards

Which way will the sound bend?

• Upwards

• Downwards

The particles in transverse waves move ___________ to the direction of the wave.

• perpendicular

• parallel

The particles in longitudinal waves move ___________ to the direction of the wave.

• perpendicular

• parallel

Are radio waves sound waves?

• Yes they are.

• No they are EM waves.

Does a bicycle reflector use reflection or refraction to achieve this 180° change in direction?

• Reflection

• Refraction

What are the conditions total internal reflection to occur? Choose all that apply.

• The angle of incidence must be smaller than the critical angle.

• The light must be moving from a less dense to a more dense medium.

• The light must be moving from a more dense to a less dense medium.

• The angle of incidence must be greater than the critical angle.

What is the critical angle for glass?

• 42°

• 45°

• 67°

• 82°