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Minimum distance between object and screen to form a real image by a converging lens is:

Option: 1

f


Option: 2

2f


Option: 3

3f


Option: 4

4f


Answers (1)

best_answer

 

 

As we learn

Condition of formation of real image -

D\geq 4f

- wherein

Distance between object & screen should be greater than or equal to 4f focal length

 

 d=\sqrt{D\left ( D-4f \right )}

for d to be real, D-4f\geqslant 0

D> 4f

 

Posted by

shivangi.bhatnagar

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