Question

A photon has a frequency of 7.3 × 10–17 Hz. Planck’s constant is 6.63 × 10–34 J•s.

The energy of the photon, to the nearest tenths place, is
× 10–50 J.

Answer 1

E = hf = (6.63 × 10^−34 J·s)(7.3 × 10^−17 s^−1) = 48.399 × 10^−51 J = 4.8399 × 10^−50 J ≈ 4.8 × 10^−50 J.