1. Which combination of colour is the most convenient during day and night time?
2. Lenses with two focal lengths are used by persons suffering from . . . . . . . .
3. Which one of the following statements regarding lenses is not correct?
4. Consider the following statements.
1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?
1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?
5. Due to atmospheric refraction, sunrise and sunset can be delayed by about . . . . . . . .
6. A water tank appears shallower when it is viewed from top due to
7. Light enters the eye from . . . . . . . .
8. The process of glare resulting from a collision caused by a collision with particles floating in a fluid of light is called:
9. The energies E1 and E2 of the two radiations are 25eV and 50eV respectively. The relation between their wavelengths i.e. λ1 and λ2 will be . . . . . . . .
10. Who can be held responsible for the fact that the sun is visible 2 minutes before the actual sunrise and about 2 minutes after the actual sunset?
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