A photon has an energy of 5.53 * 10-17 j. what is its frequency in s-1 (h = 6.63 * 10-34 j • s) ?

Given: Energy E = 5.53 X 10⁻¹⁷ J; Velocity of light c = 2.998 x 10⁸ m/s

Planck's constant h = 6.63 x 10⁻³⁴ J. s

Required: Frequency f = ?

Formula: E = hc/λ and Frequency f = V/λ

λ = (6.63 x 10⁻³⁴ J. s) (2.998 X 10⁸ m/s) / (5.53 x 10⁻¹⁷ J)

λ = 3.59 X 10⁻⁹ m

For Frequency f = ?

f = c/λ

f = 2.998 x 10⁸ m/s/3.59 x 10⁻⁹m

f = 8.35 x 10¹⁶ Hz