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प्रश्न
Explain with diagrams how refraction of incident light takes place from
- rarer to denser medium
- denser to rarer medium
- normal to the surface separating the two media.
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उत्तर
a) rarer to denser medium:
When a ray of light travels from optically rarer medium to optically denser medium, it bends towards the normal.
b) denser to rarer medium:
When a ray of light travels from an optically denser medium to an optically rarer medium it bends away from the normal.
c) normal to the surface separating the two media:
A ray of light incident normally on a denser medium, goes without any deviation.
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| Column I | Column II | ||
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| 2. | r = 90 | b. | No refraction. |
| 3. | r < 90 | c. | Refracted ray away from the normal |
