My question concerns the electromagnetic spectrum.

Question

Determine the wavelength of a photon with an energy of 3.20 x 10 to the -18th power J, and state what part of the electromagnetic spectrum it is in. 

Answer 1

Given:

Energy = E = 3.20x10^-18 J

Asked for:

Wavelength = λ

Equation to use:

E = hc / λ

where h = Planck's constant = 6.626x10^-34 J-sec

c = speed of light = 3x10⁸ m/sec

E = (6.626x10^-34 J-sec)(3x10⁸ m/sec) / λ

3.20x10^-18 = 1.988x10^-25 / λ

λ = wavelength = 6.21x10^-8 m = 62 nm

This would correspond to the ultraviolet (uv) part of the electromagnetic spectrum