Physics Questions and Answers
| 169. |
The science of Cryogenics deals with |
| |
- A. high temperature
- B. low temperatures
- C. molecular biology
- D. biotechnology
|
| 170. |
Which one of the following is a physical change? |
| |
- A. rusting of iron
- B. boiling of water
- C. burning of candle
- D. boiling of an egg
|
| 171. |
At sunrise and at sunset the sky appears red, because |
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- A. red light scatters more
- B. red light scatters less
- C. red light’s intensity is more
- D. none of the above
|
| 172. |
The sky appears to be blue because of |
| |
- A. reflection of light
- B. refraction of light
- C. scattering of light
- D. total internal reflection of light
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