BCECE SERIES Physics
Ray Optics And Optical Instruments
9 previous year questions.
Volume: 9 Ques
Yield: Medium
High-Yield Trend
3
2023 4
2009 1
2005 1
2004 Chapter Questions 9 MCQs
01
PYQ 2004
medium
physics ID: bcece-20
A plano-convex lens of refractive index and radius of curvature is silvered at the curved surface. Now, this lens has been used to form the image of an object. At what distance from this lens, an object be placed in order to have a real image of the size of the object?
1
20 cm
2
30 cm
3
60 cm
4
80 cm
02
PYQ 2005
easy
physics ID: bcece-20
The exposure time of a camera lens at setting is s. The correct exposure time at setting is:
1
0.02 s
2
0.04 s
3
0.20 s
4
0.40 s
03
PYQ 2009
medium
physics ID: bcece-20
A telescope has an objective of focal length and an eye-piece of focal length . What is the magnifying power of the telescope when it is in normal adjustment ?
1
0.2
2
2
3
20
4
200
04
PYQ 2009
medium
physics ID: bcece-20
A convex lens of glass has a focal length of when placed in air. What is the focal length of lens when it is immersed in water
1
4 cm
2
8 cm
3
16 cm
4
32 cm
05
PYQ 2009
medium
physics ID: bcece-20
An object is placed at the focus of a convex mirror. If its focal length is the distance of mirror is
1
20 cm
2
10 cm
3
40 cm
4
None of these
06
PYQ 2009
medium
physics ID: bcece-20
A convex lens of glass has a local length of 8 cm when placed in air. What is the strength of lens when it is immersed in water
1
4 cm
2
8 cm
3
16 cm
4
32 cm
07
PYQ 2023
easy
physics ID: bcece-20
In the displacement method of and be the sizes of two images, then the size of the object is:
1
2
3
4
08
PYQ 2023
hard
physics ID: bcece-20
A beaker is a field with water (μ= ) up to a height of 33.25cm. A concave mirror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25cm below the water level. The focal length of the mirror is nearly :
1
6 cm
2
18 cm
3
12 cm
4
24 cm
09
PYQ 2023
medium
physics ID: bcece-20
An air doubble is inside water (μ= ). At what distance from the air bubble should a point object be placed so as to form a real image at the same distance from the dubble? (r is the radius of curvature of the bubble)
1
2R
2
4R
3
3R
4
The air bubble cannot form a real image