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प्रश्न
During sunset and sunrise, the sun is seen when it is slightly below the horizon. Give reason.
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उत्तर
Light rays from the sun while coming towards earth suffers successive refractions from a rarer to a denser medium and so it bends towards the normal at each refraction. These rays on earth appear to be coming from an apparent position of the sun which is higher than its actual position. Thus, the sun is seen even when it is slightly below the horizon during sunset and sunrise.
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संबंधित प्रश्न
Why is the ratio of the velocities of light of wavelengths 4000Å and 8000Å in vacuum 1: 1?
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.
- Complete the path of the ray till it emerges out of the slab.
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- Mark angles of emergence by the letter e. How are the angles i and e related?
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- Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.
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(i) Draw a labelled ray diagram showing the change in the path of the ray till it emerges from the glass slab.
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(iii) Mark the lateral displacement in your diagram.
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