The small ozone layer on top of the stratosphere is crucial for human survival . Why ?

a. The small ozone layer on the top of the stratosphere is crucial for human survival. Why ? b. Where is the position of UV radiation in the electromagnetic spectrum ? c. Can you convert UV to visible radiation ? Explain. d. Which radiation is adjacent to UV to the higher frequency side of the electromagnetic spectrum ?

Give reasons for the following: (i) Long distance radio broadcasts use short-wave bands. (ii) The small ozone layer on top of the stratosphere is crucial for human survival. (iii) Satellites are used for long distance TV transmission.