Question

What is the frequency of an electromagnetic wave that has the wavelength of 4.55 ×10^-3 m

Answer 1

Answer : The frequency of an electromagnetic wave is
`6.589* 10^(10)s^-`.

Solution : Given,

wavelength =
`4.55* 10^(-3)m`

Speed of light =
`2.998* 10^(8)m/s`

Formula used :

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

`\\u` = frequency

`\lambda` = wavelength

c = speed of light

Now put all the given values in above formula, we get

`\\u=(2.998* 10^8m/s)/(4.55* 10^(-3)m)=0.6589* 10^(11)s^-=6.589* 10^(10)s^-`

Therefore, the frequency of an electromagnetic wave is
`6.589* 10^(10)s^-`.