Most of the energy emitted by the Sun is in three regions of the electromagnetic spectrum.

1. (a)(i)The name of one of these three regions is the ultraviolet region. State the names of all three regions in order of increasing frequency. smallest frequency ........................................................................................................ intermediate frequency ................................................................................................. largest frequency ..........................................................................................................[2]
2. (a)(ii)Some of the ultraviolet radiation emitted by the Sun reaches the surface of the Earth. Give one possible damaging effect of ultraviolet radiation on the human body and the property of ultraviolet radiation that causes this damage. damaging effect ............................................................................................................ property ........................................................................................................................[2]
3. (b)Electromagnetic radiation is a transverse wave. Describe the difference between a transverse wave and a longitudinal wave.[2]