Question

1.
2.
3.
A convex lens of focal length 'f produces a real image 3 times the size of an object, then distance of the
object from the lens is
id]
a) 2f/3
b) 3f/2
c) 3f/4
d) 4f/3
A concave lens of focal length f produces an image 1/3 of the size of the object, the distance of the
object from the lens is
[ a
a) 2f
b) 3f/2
c) 4f
d) 2f/3
A convex lens is placed somewhere in between an object and a screen. The distance between the
object and screen is 48cm. If the numerical value of the magnification produced by the lens is 3. focal
length of the lens is
IC
a) 16cm
b) 12cm
c) 9cm
d) 4.5cm
The distance between an object and the screen is 75cm. When a convex lens of focal length 12 cm is
placed in between the object and screen, magnification of the real image formed can be La
a) 4
b) 2
c) 8
d) 16​

Answer 1

Explanation:

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