Chromatic aberration of a lens can be corrected by

(1) Reducing its aperture

(2) Proper polishing of its surfaces

(3) Suitable combining it with another lens

(4) Providing different suitable curvature to its surfaces

Subtopic:  Lenses |
 57%
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A small air bubble is at the centre of a glass sphere of radii 5 cm. When it is viewed from outside what will be the position of the image?

Refractive index of glass is 1.5

(1) At the same place as that of object

(2) 103 cm from the surface near the eye

(3) 7.5 cm from the surface of the sphere near the eye

(4) At infinity

Subtopic:  Refraction at Curved Surface |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

The refractive indices of a prism for red, yellow and violet colours are 1.52, 1.57 and 1.62 respectively, then the dispersive power of the material of prism will be:

(1) 1.57

(2) 15.7

(3) 5.7

(4) 1

Subtopic:  Prisms |
 75%
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The magnification of a compound microscope for the final image at least distance of distinct vision is 90. The magnification of the objective lens is 15. The value of the focal length of the eyepiece will be

(1) 5 cm

(2) 6 cm

(3) 16 cm

(4) 12 cm

Subtopic:  Simple & Compound Microscope |
 66%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

A terrestrial telescope is made by introducing an inverting lens of focal length fi. The focal length of objective and eyepiece are fo and fe. Then the length of the telescope for normal adjustment is

(1) fo+fe+fi

(2) fo+fe+2fi

(3) 2fo+fe+fi

(4) fo+fe+4fi

Subtopic:  Telescope |
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The reflected light wave and incident light wave differ each other by a phase angle of 1800, when

1. Light enters into glass from air

2. Light enters into air from glass

3. Light enters into glass from diamond

4. Light enters into water from glass

Subtopic:  Refraction at Plane Surface |
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Converging rays are incident on a convex lens, the image formed

(1) May be virtual

(2) Must be virtual

(3) May be real

(4) Must be real

Subtopic:  Lenses |
 53%
From NCERT
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A small source of light is \(2\) m below the surface of a liquid of refractive index \(\frac{5}{3}.\) In order to block all the light coming out of the liquid surface, the minimum diameter of the displaced on the surface of the liquid is:
1. 3m
2. 4m
3. 6m
4. 1.5m

Subtopic:  Total Internal Reflection |
 63%
From NCERT
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A glass slab is placed with the right angle prism as shown in the figure. The possible value of θ such that light incident normally on the prism does not pass through the glass slab is:

1.  30°

2.  37°

3.  45°

4.  Both 1 & 2

Subtopic:  Prisms |
From NCERT
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A concave lens forms the image of an object such that the distance between the object and image is 10 cm. If magnification of the image is 14. The focal length of the lens is

(1) 6 cm

(2) 203 cm

(3) 107 cm

(4) 409

Subtopic:  Lenses |
 58%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh