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Q. No.To increase the angular magnification of a simple microscope, one should increase:
1.
the focal length of the lens
2.
the power of the lens
3.
the aperture of the lens
4.
the object size
Subtopic: Simple & Compound Microscope |
59%
From NCERT
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The image formed by a concave mirror:
| 1. | is always real |
| 2. | is always virtual |
| 3. | is certainly real if the object is virtual |
| 4. | is certainly virtual if the object is real |
Subtopic: Reflection at Spherical Surface |
54%
From NCERT
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In the figure, a ray of light is perpendicular to face \(\mathrm {AB}\) of a glass prism \((\mu=3/2)\). If prism is immersed in water \((\mu=4/3),\) what will be the maximum value of \(\theta\) so that ray suffers total internal reflection at face \(\mathrm{AC}\)?
(Take \(\text{sin}^{-1}(8/9)=63^\circ\))
1. \(15^\circ\)
2. \(27^\circ\)
3. \(37^\circ\)
4. \(45^\circ\)
(Take \(\text{sin}^{-1}(8/9)=63^\circ\))
1. \(15^\circ\)
2. \(27^\circ\)
3. \(37^\circ\)
4. \(45^\circ\)
Subtopic: Total Internal Reflection |
76%
From NCERT
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A biconvex lens has radii of curvature, \(20~\text{cm}\) each. If the refractive index of the material of the lens is \(1.5,\) the power of the lens is:
| 1. | infinity | 2. | \(+2~\text{D}\) |
| 3. | \(+20 ~\text{D}\) | 4. | \(+5~\text{D}\) |
Subtopic: Lenses |
74%
From NCERT
NEET - 2022
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A light ray falls on a glass surface of refractive index \(\sqrt{3}\), at an angle of \(60^\circ.\) The angle between the refracted and reflected rays would be:
| 1. | \(120^\circ\) | 2. | \(30^\circ\) |
| 3. | \(60^\circ\) | 4. | \(90^\circ\) |
Subtopic: Refraction at Plane Surface |
62%
From NCERT
NEET - 2022
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Two transparent media \({A}\) and \({B}\) are separated by a plane boundary. The speeds of light in those media are \(1.5\times 10^{8} \) m/s and \(2.0\times 10^{8} \) m/s, respectively. The critical angle for a ray of light for these two media is:
| 1. | \(\text{tan}^{-1}(0.750)\) | 2. | \(\text{sin}^{-1}(0.500)\) |
| 3. | \(\text{sin}^{-1}(0.750)\) | 4. | \(\text{tan}^{-1}(0.500)\) |
Subtopic: Total Internal Reflection |
80%
From NCERT
NEET - 2022
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A concave lens with a focal length of \(-25~\text{cm}\) is sandwiched between two convex lenses, each with a focal length of \(40~\text{cm}.\) The power (in diopters) of the combined lens system would be:
| 1. | \(55\) | 2. | \(9\) |
| 3. | \(1\) | 4. | \(0.01\) |
Subtopic: Lenses |
68%
From NCERT
NEET - 2022
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A beam of light is incident vertically on a glass slab of thickness \(1~\text{cm},\) and refractive index \(1.5.\) A fraction \(A\) is reflected from the front surface while another fraction \(B\) enters the slab and emerges after reflection from the back surface. The time delay between them is:
| 1. | \(10^{-10}~\text{s}\) | 2. | \(5\times 10^{-10}~\text{s}\) |
| 3. | \(10^{-11}~\text{s}\) | 4. | \(5\times 10^{-11}~\text{s}\) |
Subtopic: Refraction at Plane Surface |
58%
From NCERT
NEET - 2022
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Given below are two statements:
| Assertion (A): | There is no dispersion of light refracted through a rectangular glass slab. |
| Reason (R): | Dispersion of light is the phenomenon of splitting of a beam of white light into its constituent colours. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Prisms |
79%
From NCERT
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Given below are two statements:
| Assertion (A): | If objective and eye lenses of a microscope are interchanged, then it can work as telescope. |
| Reason (R): | The objective lens of telescope has small focal length. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Telescope |
From NCERT
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