Question

A photon has a wavelength of approximately 2 x 10-7m. What is the energy, in joules, associated with this photon?

A. More information is needed.
B. 4x 10-32
C. 1.5 x 1015
D. 1x 10-18
E. 1x 1018 SUBMIT​

Answer 1

E = 9.95×10⁻¹⁹ J

Step-by-step explanation:

Given data:

Wavelength = 2×10⁻⁷ m

Energy of photon = ?

Solution:

Formula:

E = hc/λ

h = 6.63×10⁻³⁴ Js

c = 3×10⁸ m/s

by putting values,

E = 6.63×10⁻³⁴ Js × 3×10⁸ m/s / 2×10⁻⁷ m

E = 19.89×10⁻²⁶Jm / 2×10⁻⁷ m

E = 9.95×10⁻¹⁹ J