# Match the corresponding entries of Column-1 with Column-2. (Where $$m$$ is the magnification produced by the mirror) Column-1 Column-2 A. $$m= -2$$ I. convex mirror B. $$m= -\frac{1}{2}$$ II. concave mirror  C. $$m= +2$$ III. real Image D. $$m= +\frac{1}{2}$$ IV. virtual Image A B C D 1. I & III I & IV I & II III & IV 2. I & IV II & III II & IV II & III 3. III & IV II & IV II & III I & IV 4. II & III II & III II & IV I & IV

Subtopic:  Reflection at Spherical Surface |
75%
From NCERT
NEET - 2016
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The angle of incidence for a ray of light at a refracting surface of a prism is $$45^{\circ}$$. The angle of the prism is $$60^{\circ}$$. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are:

 1 $$45^{0},~\sqrt{2}$$ 2 $$30^{0},~\sqrt{2}$$ 3 $$30^{0},~\frac{1}{\sqrt{2}}$$ 4 $$45^{0},~\frac{1}{\sqrt{2}}$$
Subtopic:  Prisms |
79%
From NCERT
NEET - 2016
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A lens having focal length $$f$$ and aperture of diameter d forms an image of intensity $$I$$. An aperture of diameter $$\frac{d}{2}$$in central region of lens is covered by a black paper. The focal length of lens and intensity of the image now will be respectively:
1. $$f$$ and $$\frac{I}{4}$$
2. $$\frac{3f}{4}$$ and $$\frac{I}{2}$$
3. $$f$$ and $$\frac{3I}{4}$$
4. $$\frac{f}{2}$$ and $$\frac{I}{2}$$

Subtopic:  Lenses |
58%
From NCERT
AIPMT - 2010
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A small coin is resting on the bottom of a beaker filled with a liquid. A ray of light from the coin travels up, to the surface of the liquid and moves along its surface (see figure).

How fast is the light traveling in the liquid?

 1 $$1.8 \times 10^8 \mathrm{~m} / \mathrm{s}$$ 2 $$2.4 \times 10^8 \mathrm{~m} / \mathrm{s}$$ 3 $$3.0 \times 10^8 \mathrm{~m} / \mathrm{s}$$ 4 $$1.2 \times 10^8 \mathrm{~m} / \mathrm{s}$$
Subtopic:  Total Internal Reflection |
63%
From NCERT
AIPMT - 2007
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In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be the angle of refraction?

 1 $$90^{\circ}$$ 2 $$180^{\circ}$$ 3 $$0^{\circ}$$ 4 equal to the angle of incidence
Subtopic:  Total Internal Reflection |
74%
From NCERT
NEET - 2019
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An astronomical telescope has an objective and eyepiece of focal lengths $$40$$ cm and $$4$$ cm respectively. To view an object $$200$$ cm away from the objective, the lenses must be separated by a distance:
1. $$46.0$$ cm
2. $$50.0$$ cm
3. $$54.0$$ cm
4. $$37.3$$ cm

Subtopic:  Telescope |
64%
From NCERT
NEET - 2016
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A plane mirror approaches a stationary person with acceleration of 10 ms–2. The acceleration of his image as seen by the person, will be:

 1 10 m/s2 2 20 m/s2 3 5 m/s2 4 can't be determined

Subtopic:  Reflection at Plane Surface |
66%
From NCERT
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A light ray is incident at an angle of  $$30^{\circ}$$ on a transparent surface separating two media. If the angle of refraction is $$60^{\circ}$$, then the critical angle is:

1. ${\mathrm{sin}}^{-1}\left(\frac{1}{\sqrt{3}}\right)$

2. ${\mathrm{sin}}^{-1}\left(\sqrt{3}\right)$

3. ${\mathrm{sin}}^{-1}\left(\frac{2}{3}\right)$

4. $$45^{\circ}$$

Subtopic:  Total Internal Reflection |
52%
From NCERT
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In the figure shown the angle made by the light ray with the normal in the medium of refractive index $\sqrt{2}$ is:

1. $$30^{\circ}$$

2. $$60^{\circ}$$

3. $$90^{\circ}$$

4. None of these

Subtopic:  Refraction at Plane Surface |
73%
From NCERT
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A fish is a little away below the surface of a lake. If the critical angle is $$49^{\circ}$$, then the fish could see things above the water surface within an angular range of $$\theta^{\circ}$$ where:
1. $$\theta = 49^{\circ}$$
2. $$\theta = 90^{\circ}$$
3. $$\theta = 98^{\circ}$$$\mathrm{}$
4. $$\theta = 24\frac{1}{2}^{\circ}$$

Subtopic:  Total Internal Reflection |
62%
From NCERT
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