# 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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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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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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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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A glass sphere $\left(\mu =\frac{3}{2}\right)$ of radius 12 cm has a small mark at a distance of 3 cm from its centre. Where will this mark appear when it is viewed from the side nearest to the mark along the line joining the centre and the mark?

 1 8 cm inside the sphere 2 12 cm inside the sphere 3 4 cm inside the sphere 4 3 cm inside the sphere
Subtopic:  Refraction at Curved Surface |
53%
From NCERT
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A ray of light falls on a prism ABC (AB=BC) and travels as shown in figure. The refractive index of the prism material should be greater than:

 1 $$4 /{3}$$ 2 $$\sqrt{2}$$ 3 $$1.5$$ 4 $$\sqrt{3}$$
Subtopic:  Prisms |
79%
From NCERT
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A plane-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices μ1 and μ2 and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is:
1. R/2(μ1 + μ2)
2. R/2(μ1 - μ2)
3. R/(μ1 - μ2)
4. 2R/(μ- μ1)

Subtopic:  Lens Makers' Formula |
60%
From NCERT
NEET - 2013
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The slab of a refractive index material equal to 2 shown in the figure has a curved surface APB of a radius of curvature of 10 cm and a plane surface CD. On the left of APB is air and on the right of CD is water with refractive indices as given in the figure. An object O is placed at a distance of 15 cm from pole P as shown. The distance of the final image of O from P as viewed from the left is:

 1 20 cm 2 30 cm 3 40 cm 4 50 cm
Subtopic:  Refraction at Curved Surface |
61%
From NCERT
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A rod of glass ($\mu$ = 1.5) and of the square cross-section is bent into the shape as shown. A parallel beam of light falls on the plane flat surface A as shown in the figure. If d is the width of a side and R is the radius of a circular arc then for what maximum value of $\frac{d}{R}$, light entering the glass slab through surface A will emerge from the glass through B?

 1 1.5 2 0.5 3 1.3 4 None of these
Subtopic:  Total Internal Reflection |
57%
From NCERT
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