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1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :
A
a large aperture contributes to the quality and visibility of the images.
B
a large area of the objective ensures better light gathering power.
C
a large aperture provides a better resolution.
D
All the above.
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of 40 cm from it, the final image would be formed at a distance of -

NEET 2021 Physics - Geometrical Optics Question 13 English
A
20 cm from the plane mirror, it would be a virtual image.
B
20 cm from the lens, it would be a real image.
C
30 cm from the lens, it would be a real image.
D
30 cm from the plane mirror, it would be a virtual image.
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is $$\mu $$, then the angle of incidence is nearly equal to :
A
$${{2A} \over \mu }$$
B
$$\mu $$A
C
$${{\mu A} \over 2}$$
D
$${A \over {2\mu }}$$
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The Brewster's angle ib for an interface should be :
A
30$$^\circ $$ < ib< 45$$^\circ $$
B
45$$^\circ $$ < ib< 90$$^\circ $$
C
ib = 90$$^\circ $$
D
0$$^\circ $$ < ib< 30$$^\circ $$
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