A system proposed by the U. S. Navy for underwater submarine communication, called ELF (for extremely low frequency), operates with a frequency of 30Hz. What is the wavelength of this radiation in meters

Answer

Wavelength = 30*20^8/30=10^7m

Explanation:

Velocity = frequency * wavelength

We're frequency=30HZ

Velocity of light = 3*10^8m/s

Wavelength = 30*20^8/30=10^7m

the wavelength of this radiation is 10 * 10⁶m = 10⁷m

Explanation:

Frequency, v = 30Hz = 30s⁻¹

wavelength of radiation = λ

Wavelength = speed of light / frequency

c = speed of light

c = 3 * 10⁸m/s

v = frequency

Wavelength = 3 * 10⁸ / 30

Wavelength = 10000000

Wavelength = 10 * 10⁶m

Wavelength = 10⁷m

Hence, the wavelength of this radiation is 10 * 10⁶m = 10⁷m