Use the formula `lambda_mT=0.29cmK` to obtain the characteristic temperature ranges for different parts of the e.m. spectrum. What do the number that you obtain tell you?

What do you mean by 'Inversion temperature' in different rexampleions of the atmosphere ?

The terminology of different parts of the electromagnetic spectrum is given in the text. Use the formula E = h ν (for energy of a quantum of radiation: photon) and obtain the photon energy in units of eV for different parts of the electromagnetic spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?

The substance W is a folssil fuel . It occurs deep below the ground in certain areas of the earth. Another fossil fuel X is found trapped above the deposits of W. When W is subjected to a process called Y, then a number of different products are collected at different temperature ranges which are put to different uses. A special grade of product Z obtained in this way is used as aviation fuel in jet aeroplanes. a) What are i) W and ii) X ?

The substance W is a folssil fuel . It occurs deep below the ground in certain areas of the earth. Another fossil fuel X is found trapped above the deposits of W. When W is subjected to a process called Y, then a number of different products are collected at different temperature ranges which are put to different uses. A special grade of product Z obtained in this way is used as aviation fuel in jet aeroplanes. b) What is physical state of (i) W, and (ii) X ?