Why does electromagnetic radiation in the ultraviolet region represent a larger energy transition than does radiation in the infrared region?
The energy associated to a photon is given by the equation
The electromagnetic radiation is composed by photons at a certain frequency. The ultraviolet radiation has a frequency that can range from
The infrared radiation has a frequency that can range from
Then, because the Energy is proportional to the frequency, the infrared light has an energy that is lower than the ultraviolet radiation.