Question

A light wave travels at a speed of 3.0 × 108 meters/second. If the wavelength is 7.0 × 10-7 meters, what is the frequency of the wave?

Answer 1

Answer : The frequency of the wave is,
`4.285* 10^(14)s^(-1)`

Solution : Given,

Speed of light =
`3.0* 10^(8)m/s`

Wavelength of light =
`7.0* 10^(-7)m`

Formula used :

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

`\\u` = frequency of light

`\lambda` = wavelength of light

c = speed of light

Now put all the given values in the above formula, we get the frequency of light.

`\\u=(3* 10^8m/s)/(7* 10^(-7)m)=4.285* 10^(14)s^(-1)`

Therefore, the frequency of the wave is,
`4.285* 10^(14)s^(-1)`