Question

A wave has an energy of 1.5x10^3 J. Find its wavelength?

Answer 1

Answer:

1.3 × 10⁻²⁸ m

Explanation:

The equation relating the energy (E) and the wavelength (λ) of a wave is  

$E =\frac{hc}{\lambda}$

where h = Planck’s constant and c = the speed of light

$\lambda =\frac{6.626 \times 10^{-34}\text{ J}\cdot \text{s} \times 2.998 \times 10^{8} \text{ m} \cdot \text{s}^{-1}}{1.5 \times 10^{3} \text{ J}} = 1.3 \times 10^{-28}\text{ m}$