Wave Propagation — Practice Quiz

Question 1

When a wave enters a new medium:

Accepted Answer

Only λ changes (f stays)

Answer

Both f and λ change

Answer

Only f changes

Answer

Neither changes

Question 2

Wave on string fixed at one end — reflected wave at fixed end is:

Accepted Answer

Inverted

Answer

Erect

Answer

Doubled in amplitude

Answer

Doesn't reflect

Question 3

Two waves of equal amplitude in PHASE superpose. Resultant amplitude:

Accepted Answer

Doubled (constructive)

Answer

Zero

Answer

Half

Answer

Same as one wave

Question 4

Diffraction of waves becomes noticeable when:

Accepted Answer

Wavelength comparable to aperture

Answer

Wavelength much larger than aperture

Answer

Wavelength much smaller than aperture

Answer

Aperture is infinite

Question 5

Energy transported by a wave is proportional to:

Accepted Answer

Amplitude² × frequency²

Answer

Amplitude

Answer

Frequency

Answer

Wavelength