Physics
An electromagnetic radiation is used for photography in fog.
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose?
Related Questions
(i) Define couple.
(ii) State the S.I. unit of moment of couple.
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.
The specific heat capacity of a substance A is 3,800 J kg-1K-1 and that of a substance B is 400 J kg-1K-1. Which of the two substances is a good conductor of heat? Give a reason for your answer.