TS EAMCET · Physics · Electrostatics
A screen is placed from an object. The image is formed by using a convex lens twice on the screen by putting the lens at two different locations separated by The focal length of the lens is approximately equal to:
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
The image of the object can be located on the screen for a two-position of convex lens such that, u and v are exchanged. The separation between two positions of the lens is, d= 20 cm From the figure, u1+v1=90 cm, v1-u1=20 cm, it means, v1=55 cm and…
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