1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
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Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5 $$\times$$ 108 m/s and 2.0 $$\times$$ 108 m/s, respectively. The critical angle for a ray of light for these two media is

A
sin$$-$$1 (0.500)
B
sin$$-$$1 (0.750)
C
tan$$-$$1 (0.500)
D
tan$$-$$1 (0.750)
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
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 18 English
A
90$$^\circ$$
B
60$$^\circ$$
C
30$$^\circ$$
D
45$$^\circ$$
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
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
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
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.
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