Question

Which of the following wavelengths of light has the highest energy?
1. 10 mm
2. 650 nm
3. 10 µm
4. 0.1 nm
5. 10 cm

Answer 1

E = hv
v = c /λ

E=energy
h=plank's Constant
v=velocity
c=speed of light
λ=wavelength

λ increases, E decreases.

I'll let you figure out the correct answer.