Question

?please and thankyou.

A gamma ray with an energy of 3.40 × 10-14 joules strikes a photographic plate. We know that Planck's constant is 6.63 × 10-34 joule·seconds. What is the frequency of the photon?

A. 5.13 × 1019 hertz

B. 5.60 × 1017 hertz

C. 2.45 × 1017 hertz

D. 2.45 × 10-12 hertz

E. 7.80 × 10-19 hertz

Answer 1

how would i solve this?

Answer 2

ans is A USE THE FORMULAE E=hf

Answer 3

thanks