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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
What is the difference between regular reflection of light and diffuse reflection of light?
State and explain the laws of reflection of light at a plane surface (like a plane mirror), With the help of a labelled ray-diagram. Mark the angles of 'incidence' and 'reflection' clearly on the diagram. If the angle of reflection is 47.5°, what will be the angle of incidence?
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of refraction?
Match the Following
| Column A | Column B |
| (a) white Light | (1) Convex mirror |
| (b) Refraction | (2) Concave mirror |
| (c) Virtual images | (3) refraction |
| (d) Real images | (4) spectrum |
| (e) Prism | (5) ray of light from glass to air |
Explain how the formation of a rainbow occurs.
Write scientific reason.
The coin disappears in a vessel as it is seen from a specific location. But as soon as the water is poured into the vessel to a certain level, the coin appears.
Observe the given figure and write appropriate phenomenon of light in the box.
If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct?
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
When a ray of light travels normal to the given surface, then the angle of refraction is ______.
