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प्रश्न
Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
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उत्तर
Glass is optically denser as compared to water.
(Speed of light in an optically rarer medium is more than the speed of light in a denser medium.)
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संबंधित प्रश्न
| Column I | Column II | Column III | |
| 1 | Dispersion | Long-sightedness | Twinkling of stars |
| 2 | Refraction | Splitting of white light into component colours | Convex lens |
| 3 | Hypermetropia | Change in the direction of the ray of light due to change in medium | Spectrum of seven colours |
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(a) virtual
(b) real
(c) diminished
(d) upside-down
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(a) a concave mirror, and (b) a convex mirror
Fill in the blank and Explain the completed sentences.
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| Ray AB | |
| Ray NM | |
| Ray MD | |
| ∠ r |
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Noor, a young student, was trying to demonstrate some properties of light in her Science project work. She kept ‘X’ inside the box (as shown in the figure) and with the help of a laser pointer made light rays pass through the holes on one side of the box. She had a small butter-paper screen to see the spots of light being cast as they emerged.

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- Air and glass allow light to pass through them with the same velocity.
- Air is optically rarer than glass.
- Speed of light through a denser medium is faster than that of a rarer medium.
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