PROBLEM 33P

List the types of electromagnetic radiation in order of increasing energy per photon.

(a) radio waves

(b) microwaves

(c) infrared

(d) ultraviolet

Solution 33P

Step 1:

The photon energy is the energy carried by a single photon with a certain electromagnetic wavelength and frequency. The higher the photon's frequency, the higher its energy. Equally, the longer the photon's wavelength, the lower its energy.

It is calculated using the formula :

E = or E = hf

Where, E = energy per photon

h = planck’s constant = 6.626 10-34 J /s

c = speed of light = 3108 m /s

= wavelength of light

f = frequency of light.