Q. No.
The focal length of the lens is nearly:
| 1. | \(2~\text{cm}\) | 2. | \(20~\text{cm}\) |
| 3. | \(115~\text{cm}\) | 4. | \(230~\text{cm}\) |
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| 1. | increases by \(15^{\circ}\). | 2. | increases by \(30^{\circ}\). |
| 3. | decreases by \(15^{\circ}\). | 4. | decreases by \(30^{\circ}\). |
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1. \(2.8~\text{cm}\)
2. \(2.8~\text{mm}\)
3. \(1.4~\text{mm}\)
4. \(0.7~\text{mm}\)
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Then,
| 1. | \(D=f_1+f_2,~\text{and}~d'=d\) |
| 2. | \(D=f_1-f_2,~\text{and}~d'<d\) |
| 3. | \(D=f_2-f_1,~\text{and}~d'>d\) |
| 4. | \(D=f_1+f_2,~\text{and}~d'>d\) |
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1. \(15~\text{cm}\)
2. \(30~\text{cm}\)
3. \(45~\text{cm}\)
4. \(90~\text{cm}\)
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| 1. | \(2~\text{m}\) | 2. | \(6~\text{m}\) |
| 3. | \(8~\text{m}\) | 4. | \(4~\text{m}\) |
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Then:
| 1. | \(\mu_{2}=\dfrac{1}{3},~\mu_{3}=\dfrac{1}{2}\) | 2. | \(\mu_{2}=3,~\mu_{3}=\dfrac{3}{2}\) |
| 3. | \(\mu_{2}=\dfrac{1}{3},~\mu_{3}=\dfrac{2}{3}\) | 4. | \(\mu_{2}=3,~\mu_{3}=2\) |
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1. \(50\) cm
2. \(-50\) cm
3. \(-50/1.2\) cm
4. \(-50 \times1.2\) cm
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Then,
| 1. | \(t_{APB}=t_{AQB}\) |
| 2. | \(t_{APB}<t_{AQB}\) |
| 3. | \(t_{APB}>t_{AQB}\) |
| 4. | \(t_{APB}\) maybe greater than or less than \(t_{AQB}\) depending on whether \(Q\) is to the left or right of \(P\). |
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| 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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