In the emission spectrum of hydrogen, which electronic transition would produce a line in the visible region of the electromagnetic spectrum?

List the following types of electromagnetic radiation in order of increasing wavelength (shortest first).

I. Yellow light

II. Red light

III. Infrared radiation

IV. Ultraviolet radiation.

The thinning of the ozone layer increases the amount of $\mathrm{UV}-\mathrm{B}$ radiation that reaches the earth's surface.

Based on the information in table, explain why $\mathrm{UV}-\mathrm{B}$ rays are more dangerous than $\mathrm{UV}-\mathrm{A}$.