Question

Communications in mineshafts and at low ocean depths require extremely low frequencies to penetrate solid rock or dense seawater. If a radio transmitter operates at 76.0 Hz, what is the wavelength of this radiation in meters? Select one:

1. 3.9 x 106 m
2. 5.0 x 10-32 m
3. 2.3 x 10-6 m
4. 2.3 x 1011 m

Answer 1

Answer: The wavelength of the radiation is
`3.9* 10^(6)m`

Step-by-step explanation:

To calculate the wavelength of light, we use the equation:

`\lambda=(c)/(\\u)`

where,

`\lambda` = wavelength of the radiation

c = speed of light =
`3* 10^8m/s`

`\\u` = frequency of radiation =
`76Hz=76s^(-1)`

Putting values in above equation, we get:

`\lambda=(3* 10^8m/s)/(76s^(-1))=3.9* 10^(6)m`

Hence, the wavelength of the radiation is
`3.9* 10^(6)m`