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List of top Physics Questions on spherical lenses asked in KEAM
The magnification of an image by a convex lens is positive only when the object is placed
KEAM
Physics
spherical lenses
The position of final image formed by the given lens combination from the third lens will be at a distance of [
f
1
=
+
10
c
m
,
{{f}_{1}}=+10\text{ }cm,
f
1
=
+
10
c
m
,
f
2
=
−
10
c
m
,
{{f}_{2}}=-10cm,
f
2
=
−
10
c
m
,
f
3
=
+
30
c
m
{{f}_{3}}=+30\text{ }cm
f
3
=
+
30
c
m
]
KEAM
Physics
spherical lenses
The least distance of distinct vision of a person is
75
c
m
75\, cm
75
c
m
. The focal length of the reading spectacles for such a person should be
KEAM
Physics
spherical lenses