1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Find the value of the angle of emergence from the prism. Refractive index of the glass is $$\sqrt 3 $$

NEET 2021 Physics - Geometrical Optics Question 17 English
A
90$$^\circ$$
B
60$$^\circ$$
C
30$$^\circ$$
D
45$$^\circ$$
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A convex lens 'A' of focal length 20 cm and a concave lens 'B' of focal length 5 cm are kept along the same axis with a distance 'd' between them. If a parallel beam of light falling on 'A' leaves 'B' as a parallel beam, then the distance 'd' in cm will be :
A
30
B
25
C
15
D
50
3
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.
4
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 15 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.
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