For the wave shown in figure, the frequency and wavelength,... | PHYSICS - BEATS | SolveeIt | Solveeit

Today, August 19

Question

For the wave shown in figure, the frequency and wavelength, if its speed is 320 m/sec, are –

A

8 cm, 400 Hz

B

80 cm, 40 Hz

C

8 cm, 4000 Hz

D

40 cm, 8000 Hz

Answer

8 cm, 400 Hz

Explanation

Solution

l = $\frac{\lambda}{2}$ Ž l = 2l

\ n = $\frac{v}{\lambda}$ = $\frac{v}{2\mathcal{l}}$ = (n + 1) $\frac{v}{2\mathcal{l}}$

\ L = (n + 1) l