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A thin plano-convex lens of focal  is split into two halves. One of the halves is shifted along the optical axis. The separation between object and image plane is 1.8 m. The magnification of the image formed by one of the half lens is 2. Find the focal-length of the lens and separation between the two halves

a)

0.1 m

b)

0.4 m

c)

0.9 m

d)

1 m


Question ID - 152606 | Toppr Answer

A thin plano-convex lens of focal  is split into two halves. One of the halves is shifted along the optical axis. The separation between object and image plane is 1.8 m. The magnification of the image formed by one of the half lens is 2. Find the focal-length of the lens and separation between the two halves

a)

0.1 m

b)

0.4 m

c)

0.9 m

d)

1 m

1 Answer - 5876 Votes

3537

Answer Key : (b) -

(b)

This is a modified displacement method problem

Here,m and

Solving we get m

m



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