Q. No.Given below are two statements:
Assertion (A):
Parallel rays of light of different colours fail to converge to a point after reflection from a spherical mirror.
Reason (R):
The refractive index of any material depends on the frequency of light.
1.
(A) is True but (R) is False.
2.
(A) is False but (R) is True.
3.
Both (A) and (R) are True and (R) is a correct explanation of (A).
4.
Both (A) and (R) are True but (R) is not a correct explanation of (A).
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| 1. | \(u\) | 2. | \(u/2\) |
| 3. | \(2u\) | 4. | \(4u\) |
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1. \(3:1\)
2. \(2:1\)
3. \(1:1\)
4. \(-2:1\)
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| 1. | \(100~\text{cm}\) in front of the concave lens |
| 2. | \(50~\text{cm}\) in front of the concave lens |
| 3. | \(50~\text{cm}\) behind the concave lens |
| 4. | infinity |
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1. \(3\)
2. \(2\)
3. \(1.25\)
4. \(1.2\)
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| 1. | \( \left ( \dfrac{7}{6} \right )^\circ\) | 2. | \( \left ( \dfrac{3}{2} \right )^\circ\) |
| 3. | \(- \left ( \dfrac{1}{2} \right )^\circ\) | 4. | \( \left ( \dfrac{1}{2} \right )^\circ\) |
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| Colour | Deviation | ||
| Violet | \(2.04^\circ\) | ||
| Yellow | \(2.00^\circ\) | ||
| Red | \(1.96^\circ\) |
2. \(0.02\)
3. \(25\)
4. \(50\)
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| 1. | Just behind the lens. |
| 2. | At the focus of the lens. |
| 3. | At a distance of \(2f\) from the lens. |
| 4. | At a distance of \(3f\) from the lens. |
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| 1. | focuses at a distance of \(100\) cm from the second lens. |
| 2. | focuses at \(200\) cm from second lens. |
| 3. | focuses at \(150\) cm from second lens. |
| 4. | emerges as a parallel beam. |
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| 1. | converging mirror of focal length \(200\) cm. |
| 2. | converging mirror of focal length \(100\) cm. |
| 3. | diverging mirror of focal length \(200\) cm. |
| 4. | diverging mirror of focal length \(100\) cm. |
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