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0 votes
in Physics by (27.6k points)

A doctor has advised to use 2.5D lens. The focal length of the lens is ………………….. 

A) 40 cm 

B) 250 cm 

C) 2.5 cm 

D) 50 cm

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1 Answer

+1 vote
by (27.3k points)

Correct option is  A) 40 cm

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