Waves Quizs (#77-107)

The energy of a mechanical wave is proportional to its

• frequency

• wavelength

• amplitude

• speed

Amplitude of sound and light waves determine their

• loudness and brightness

• frequency and wavelength

• color and intensity

• speed and direction

The speed of a wave depends only on the

• medium

• frequency

• amplitude

• wavelength

The speed of all types of electromagnetic waves is

• different in various mediums

• the same (in a vacuum)

• faster than sound waves

• slower than light waves

Diffraction is the

• spreading of waves into a region behind a barrier in the wave’s path.

• reflection of waves off a surface.

• absorption of waves by a medium.

• transmission of waves through a barrier.

The speed of electromagnetic waves can slow down

• in a vacuum

• in mediums other than a vacuum

• in outer space

• in a black hole

As the index of refraction decreases, the speed and wavelength of a wave in that medium

• decrease

• remain constant

• increase

• fluctuate

Destructive interference occurs when two waves

• add for greater amplitudes

• subtract for lesser amplitudes

• cancel each other out completely

• combine to form a new wave

High frequency means

• long period

• short period

• medium period

• no period

Once a wave has been generated, its

• frequency will not change

• amplitude will increase

• speed will decrease

• wavelength will vary