1
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two thin lenses have a combined power of +9D. When they are separated by a distance of 20 cm , their equivalent power becomes $+\frac{27}{5} \mathrm{D}$. The power of both the lenses in dioptre are respectively

A
$ 4,5$
B
$ 3,6$
C
$2,7$
D
$ 1,8$
2
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A plane mirror produces a magnification of

A
$-1$
B
zero
C
$+1$
D
$+2$
3
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The telescopes, for a given wavelength, the objectives with large aperture are used for

A
greater magnification.
B
greater resolution.
C
reducing lens aberration.
D
ease of manufacture.
4
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Refractive index of a glass convex lens is 1.5. The radius of curvature of each of the two surfaces of the lens is $$20 \mathrm{~cm}$$. The ratio of the power of the lens when immersed in a liquid of refractive index 1.25 to that when placed in air is

A
2 : 3
B
2 : 5
C
3 : 5
D
5 : 2
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