Gopal visits his friend Naresh. In his house Naresh was playing with his kid sister and in spite of the broad day light, Gopal notices the tube light burning and advises him to save electricity. He also claims that the heat inside the room increases which would lead to global warming.
(a) What are the values associated with the decision saving electricity ?
(b) Which electromagnetic wave is responsible for increase in the average temperature of the earth ? Give other applications of the electromagnetic wave.