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प्रश्न
What is atmospheric reflection? Explain with the help of a labelled diagram that the position of a star as seen by us is not its true position.
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उत्तर
Refraction of light by earth’s atmosphere is called at,ospheric refraction
Since the atmosphere bends the starlight towards the normal, the apparent position of the star is slightly different from actual position.
The star appears slightly higher from actual position when viewed near horizon.
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संबंधित प्रश्न
State the uses of plane mirrors.
Which phenomenon of light makes the water to appear shallower than it really is?
When a light ray passes from air into glass, what happens to its speed? Draw a diagram to show which way the ray of light bends.
When a ray of light travelling in glass enters into water obliquely ______.
When a ray of light travels from air to glass, it bends .......... the normal.
Right or wrong sentence.
The incident rays and refracted rays are on opposite sides of the column.
Assertion: The air bubble shines in water.
Reason: Air bubble shines due to the refraction of light.
Which is optically denser out of the two medium M1& M2 having the refractive indices = 1.71 and 1.36 respectively?
Match the following:
| Column I | Column II | ||
| 1. | r > 90 | a. | Light gazes at the surface of separation between the two modes. |
| 2. | r = 90 | b. | No refraction. |
| 3. | r < 90 | c. | Refracted ray away from the normal |
The absolute refractive index of a medium is given by:
