BITSAT SERIES Physics
Spherical Lenses
4 previous year questions.
Volume: 4 Ques
Yield: Medium
High-Yield Trend
1
2021 1
2020 1
2016 1
2013 Chapter Questions 4 MCQs
01
PYQ 2013
medium
physics ID: bitsat-2
The given lens is broken into four parts and rearranged as shown. If the initial focal length is , then after rearrangement the equivalent focal length is Ć¢
1
2
3
4
02
PYQ 2016
medium
physics ID: bitsat-2
A lens having focal length f and aperture of diameter d forms an image of intensity I. Aperture of diameter d/2 in central region of lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively:
1
and
2
and
3
and
4
(f)/(2) and (I)/(2)
03
PYQ 2020
medium
physics ID: bitsat-2
A lens having focal length f and aperture of diameter d forms an image of intensity I. Aperture of diameter d/2 in the central region of lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively:
1
2
3
4
(f)/(2), (I)/(2)
04
PYQ 2021
medium
physics ID: bitsat-2
Two plano-convex lenses (1 and 2) of glass of refractive index 1.5 have radii of curvature 25cm and 20cm. They are placed in contact with their curved surfaces towards each other and the space between them is filled with liquid of refractive index 4/3. The combination is: 
1
convex lens of focal length 70cm
2
concave lens of focal length 70cm
3
concave lens of focal length 66.6cm
4
convex lens of focal length 66.6cm