Question

The energy of a given wave in the electromagnetic spectrum is 2.64 × 10-21 joules, and the value of Planck’s constant is 6.6 × 10-34 joule·seconds. What is the value of the frequency of the wave?
4.00 × 1012 hertz
2.34 × 10-12 hertz
1.30 × 1013 hertz
2.52 × 10-6 hertz
8.11 × 10-7 hertz
20 points + Brainly

Answer 1

E=hf  so
f = E/h = 2.64e-21/6.6e-34 = 4.0e12Hz  (answer A)