What is the wavelength of blue light if it has a frequency of 6.67 x 1014 sec (Hz)?
We know that for any kind of waves, the wavelength multiplied by its frequency is equal to its speed. That is:
Wavelength x Frequency = Speed
Wavelength = Speed/Frequency
The speed of light in vacuum is 299,792,000 meters per second.
Substituting the given value of speed of light and the given value of frequency in the above equation for wavelength:
Wavelength = 299,792,000/(6.67x10^14)
= 4494.6327x10^(-10) meters
Wavelength of blue light = 4494.6327x10^(-10) meters
Speed of light=3*10^8m/s
Wavelength = 4.5*10^-7m