Question

Hello!!

A wave of wavelength 0.60 cm is produced in air and travels at a speed of 300 ms^-1.Will it be audible?​

Answer 1

Answer:

→50000 Hz

Explanation:

From the relation U = Vλ, the frequency of the wave is

$V = \frac{U}{λ} = \frac{300 {m}^{ - 1} }{0.60 \times {10}^{ - 2} }$

$V = 50000 \: \: Hz$

This Is much above the audible range. It is an ultrasonic wave and will not be audible

Answer 2

it is not audible.

it is given that, wavelength of wave produced in air , λ =0.6 cm = 6 × 10^-3 m

speed of wave, v = 300m/s

we know the relation,

speed of wave = frequency × wavelength

so, frequency of produced wave in air, f = speed of wave/wavelength = v/λ

= 300/(6 × 10^-3)

= 5 × 10⁴

= 50,000 Hz > 20,000 Hz ( obviously 50,000 is greater than 20,000)

but we know, The human have tendency to ear only within range 20Hz - 20,000 Hz.

then, this wave is not heard by human. it is not audible.

[note :- wave of higher frequency than 20,000 Hz is known as Ultrasonic wave. ]

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