First slide

Characterstics of wave

Question

A sound wave of frequency 500 Hz covers a distance of 1000 m in 5 second between the points X and Y. Then the number of waves between X and Y is:

Moderate

A

500
B

1000
C

2500
D

5000

Solution

$V = \frac{1000}{5} = 200 m / s$
$v = nλ \Rightarrow λ = \frac{V}{n} = \frac{2000}{500}$
No. of waves = $\frac{L}{λ}$ = $\frac{1000 \times 500}{200} = 2500$

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