i) Explain, In black body radiations what is represented by the term 4πre2 (ii) Explain, In black body radiation what is represented by the term α. (iii) Derive equations representing the temperature of the single atmospheric layer, and the temperature of the ground. State all the assumptions you have made.

i) Explain, In black body radiations what is represented by the term 4πre2 (ii) Explain, In black body radiation what is represented by the term α. (iii) Derive equations representing the temperature of the single atmospheric layer, and the temperature of the ground. State all the assumptions you have made.