the image of an object placed 36 cm from a shpericl lens is formed on a screen at a distace of 72 cm from lens Find its f?
Will v=72 or v= -72 why
Asked by P S Lakshmi | 4th Mar, 2015, 02:39: PM
Object distance, u = -36 cm ;
Image distance, v = 72 (image formed is real so taken as positive)
Focal length, f = ?
Substituting these values in the mirror formula we get:
Thus, the focal length of the lens is 24 cm.
Answered by Yashvanti Jain | 11th Dec, 2017, 07:13: PM
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