Question

Wavelength of a 1 keV photon is 1.24*10-9 m. Find the frequency of a 1 MeV photon.

Answer 1

hey !!

c = lambda × frequency

3×10^8 / 1.24 × 10^-9 = v

Answer 2

FREQUENCY =SPEED OF LIGHT / LAMBDA (Use this formula )

So speed of light is 3×10 to the power 8

And lambda is 1.27×10 to the power -9 .

FREQUENCY =3×10 to the power 8 divided by/ 1.27 ×10to the power -9 = 2.6 × 10 to the power 20