It is dangerous to observe Solar eclipse with naked eyes because
1). Infrared radiations from sun burn our retina
2). Ultraviolet radiations from Sun bum our retina
3). All radiations from sun initiate chemical reactions in eyes
4). Cosmic rays reach eyes more during the eclipse .
1. Which among the following is not a characteristic of transition metals?
2. An anemometer measures which of the following ?
3. Coolis tube is used to produce
4. What is the value of acceleration due to gravity at the centre of earth?
5. What is the unit of electric resistance?
7. Railway tracks are banked on curves
9. If a body moves with a uniform speed in a circular motion, then______.