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a screen is placed 90cm from an object the image of the object on the screen is formed by a convex lens at two diferent locations seperated by 20cm determine the focal length of lens

a screen is placed 90cm from an object  the image of the object on the screen is formed by a convex  lens at two diferent locations seperated by 20cm determine the focal length of lens
 
 
 
 

Grade:10

1 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
one year ago
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