0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

# A plano convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. Now this lens has been used to from 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 :20 cm30 cm60 cm80 cm

A
30 cm
B
80 cm
C
20 cm
D
60 cm
Solution
Verified by Toppr

#### If the curved surface of a plano-convex lens is silvered, the focal length of the lens is given by1F=2μR ⟹F=R2μ=302×1.5=10cmThe real image will be equal to the size of the object if the object distance u=2F=2×10=20cm

22
Similar Questions
Q1
A plano convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. Now this lens has been used to from 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 :
View Solution
Q2
A plano – convex lens of refractive index 1.5 and radius of curvature 30cm is silvered at the curved surface. Now this lens is 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?
View Solution
Q3
A plano-convex of refractive index 1.5 and radius of curvature 30 cm 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?
View Solution
Q4
A plano-convex lens of focal length 20 cm has its plane side silvered:
View Solution
Q5
One surface of a biconvex lens having focal length 40 cm is silvered. The radius of the curvature of the other surface is 60 cm. At what distance the silvered lens should an object be placed to obtain a real image magnified three times ?
(Refractive index of lens, μL=1.5)
View Solution