Question

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Answer 1

Answer:

the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

Frequency is the number of occurrences of a repeating event per unit of time. It is also referred to as temporal frequency, which emphasizes the contrast to spatial frequency and angular frequency. Frequency is measured in hertz which is equal to one occurrence of a repeating event per second

the repetition of a sound caused by reflection of sound waves. b : the sound due to such reflection. 2a : a repetition or imitation of another : reflection.

Answer 2

Answer:

Echo- A sound or sounds caused by the reflection of sound waves from a surface back to the listener.

"the walls threw back the echoes of his footsteps"

2-Frequency- the rate at which something occurs over a particular period of time or in a given sample.

"an increase in the frequency of accidents due to increased overtime"

3- Wavelength-the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

"a range of wavelengths"