Question

A wave has 9.2 x 10^-22 j of energy. What is its wavelength?
Please help

Answer 1

2.2 × 10⁻⁴ m

Step-by-step explanation:

Step 1: Given and required data

• Energy of the wave (E): 9.2 × 10⁻²² J

• Planck's constant (h): 6.63 × 10⁻³⁴ J.s

• Speed of light (c): 3.00 × 10⁸ m/s

Step 2: Calculate the wavelength (λ) of the wave

We will use the following expression.

E = h × c/λ

λ = h × c/E

λ = 6.63 × 10⁻³⁴ J.s × 3.00 × 10⁸ m/s/9.2 × 10⁻²² J

λ = 2.2 × 10⁻⁴ m