Question

What would the wavelength of a photon be if its energy is 4.79x10-19 J?

Answer 1

Answer:

λ = 4.2 × 10⁻⁷ m

Explanation:

Given data:

Energy of photon = 4.79 × 10 ⁻¹⁹ J

Wavelength of photon = ?

Solution:

E = h.c / λ

λ = h. c/ E

λ = 6.63× 10⁻³⁴m² kg/s × 3×10⁸ m/s / 4.79 × 10 ⁻¹⁹ Kg m²/s²

λ = 19.89 × 10⁻²⁶ kg. m³ /s² / 4.79 × 10 ⁻¹⁹ Kg m²/s²

λ = 4.2 × 10⁻⁷ m