Waves, Sound, Light Review

Which choice below does NOT describe sound waves?

• Sound waves are mechanical waves

• Sound waves are longitudinal waves

• Sound waves require a medium

• Sound waves travel fastest in a vacuum

Which of these determines the volume of a sound?

• frequency of the waves

• amplitude of the waves

• pitch of the sound

• speed of the sound

The pitch of a sound is most closely related to the

• frequency of the sound waves

• distance from the sound source

• medium through which the sound travels

• intensity of the sound

Which statement below best explains the Doppler Effect?

• The intensity of a sound increases as the observer moves toward the source of the sound.

• The pitch of a sound decreases as the source of a sound moves away from an observer.

• A speed of sound increases as the source of a sound moves toward an observer.

• The quality of a sound decreases as the observer moves away from the source of the sound.

Which of these Electromagnetic waves has the highest energy?

• gamma rays

• ultraviolet light

• infrared

• microwaves

As the frequency of light waves increase,

• the speed increases

• the energy decreases

• the energy stays the same

• the wavelength decreases

Energy from the sun is transported by

• mechanical waves

• electromagnetic waves

• sound waves

• compression waves

What kind of interference is shown in the waves interaction above?

• Resonance

• Constructive Interference

• Destructive Interference

• Doppler Effect

You will see a flash of lightening before you hear the thunder that goes with it because

• the eye is quicker than the ear

• sound travels faster through the atmosphere than light

• thunder occurs much later than lightening

• light travels faster through the atmosphere than sound

The diagram above illustrates the Law of Reflection on a flat surface such as a mirror. If the incoming light ray,  $\theta_i$  , has an angle of  $50^o$  , what would the reflected light ray,  $\theta_r$  be?

•  $60^o$  

•  $90^o$  

•  $50^o$  

•  $40^o$