At what altitude do ultraviolet waves of higher frequencies produce ionized layers?

The correct answer indicates that ultraviolet waves of higher frequencies interact with the atmosphere to produce ionization at lower altitudes. This phenomenon primarily occurs because the intensity of ultraviolet light is strong enough at certain altitudes to ionize atoms and molecules in the atmosphere, particularly in the mesosphere, which is relatively lower compared to other atmospheric layers.

Ultraviolet radiation, especially at higher frequencies, has enough energy to remove electrons from gases in the atmosphere, leading to the formation of ionized layers. In this context, lower altitudes are where the density of atmospheric particles is sufficient for these interactions to have meaningful effects.

In contrast, higher altitudes have a thinner atmosphere, resulting in a reduced number of gas particles for ionization processes to occur effectively. At ground level, the interaction with UV radiation is minimal since the atmosphere largely absorbs harmful UV rays before they reach the surface, preventing effective ionization. Mid-level altitudes may not have the same conditions necessary for significant ionization as those found in the lower altitudes, where the density of atmospheric components can interact more readily with the incoming UV radiation.