Sound Test

Result

Sound Test - 12

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Weekly Quiz Competition

Question 1
1 / -0

The distance between two consecutive crests or troughs of a wave is known as its

A
amplitude

B
frequency

C
time period

D
wavelength

Solution

The wavelength of a wave is the distance between its two consecutive crests or troughs.

The correct answer is D.

Why alternative A is wrong:

The amplitude of a wave is the distance between its peak and midpoint.

Why alternative B is wrong:

The frequency of a wave is the number of cycles that pass through the observer in a given period of time.

Why alternative C is wrong:

The time period of a wave is the time in which the wave completes one crest and one trough.
Question 2
1 / -0

A longitudinal wave cannot travel through

A
gas

B
solid

C
liquid

D
vacuum

Solution

A longitudinal wave consists of alternate compression and rarefaction of the medium. In a longitudinal wave, the particles of the medium vibrate along the direction of motion of the propagation of the wave. Therefore, a longitudinal wave requires a material medium to propagate. Hence, a longitudinal wave cannot travel through vacuum.

The correct answer is D.

Why alternatives A, B and C are wrong:

A longitudinal wave can travel through gas, solid, and liquid.