Gopal went to his friend Naresh house and saw that Naresh was playing with his kid sister.

Gopal went to his friend Naresh house and saw that Naresh was playing with his kid sister. Inspite of day time, Gopal observed that a tube light was burning, so he asks Naresh to switch off the light and save electricity. Further Gopal while explaining to Naresh claimed that the heat inside the room increases which could lead to global warming. 

(i) What are the values associated with the decision saving electricity?

(ii) Which electromagnetic wave is responsible for increase in the average temperature of the earth ? Give other applications of the electromagnetic wave.