Night photography and photography In mist and fog are possible using
1). ultraviolet radiation
2). infrared radiation
3). microwave radiation
4). gamma radiation
1. Which of the following are used for accurately measuring very small time intervals ?
2. Air pollution by "Fly ash" is caused?by:
3. The sparkling of a diamond is due to
5. In a projectile motion, a large angle with the horizontal produces ______.