Question

What is the wavelength of red light with a frequency of `460 * 10^12` `Hz`?

Answer 1

`lambda=6.52*10^-7 m`, rounded to two decimal places
or `652nm`

Explanation:

Speed of light in vacuum is `3.0*10^8ms^-1`
Frequency, wavelength and speed of light are related by the equation `"Speed"="Frequency"xx"Wavelength"`
or `c=nu*lambda`
Inserting given values in the equation we obtain `3.0*10^8=460*10^12xxlambda`
`lambda=(3.0*10^8)/(460*10^12)=6.52*10^-7m`, rounded to two decimal places

or `=652nm`