Question

A wave of frequency 400hz in air has a speed of 320m/s find its wave length. what will be the new wave length when it enters water in which its speed is 1600m/s​?

Answer 1

The wavelength of a wave can be calculated using the formula wavelength = speed/frequency. In air, the wave with a frequency of 400 Hz and a speed of 320 m/s has a wavelength of 0.8 m. When the wave enters water with a speed of 1600 m/s, its wavelength becomes 4 m.

Step-by-step explanation:

To find the wavelength of a wave, we can use the formula: wavelength = speed/frequency. In the first scenario where the wave is in air, with a frequency of 400 Hz and a speed of 320 m/s, we can calculate the wavelength as follows:

wavelength = 320 m/s / 400 Hz = 0.8 m

When the wave enters the water and its speed becomes 1600 m/s, we can calculate the new wavelength using the same formula:

new wavelength = 1600 m/s / 400 Hz = 4 m