The SI unit of length is a meter, which is defined as the length equal to 1,650,763.73 wavelengths of light emitted by a particular energy transition in krypton atoms.

Question

Calculate the frequency of the light to three significant figures.

Answer 1

Let's see. If
1,650,763.73 wavelengths x wavelength = 1 m, and you solve for wavelength = ?

Then c = fw
c = 3E8 m/s
f = frequency = ?
w = from above.
Solve for f.

Answer 2

4.95*10^14 HZ

Answer 3

1650763.73X_________________=1metre
=86 krypton