an object placed 30cm from a lens from an image on screen placed 60cm on of other side of the lens . identify the type of lens and determine it's focal length
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Answer:
u is negative because image is formed on the on the other side of the lens. It is a convex lens.
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Answer:
convex lenses
Explanation:
and focal length 1/f= 1/V + 1/U
=》1/60+(-1/30)
=》1/60-1/30
by cross multiplication
60-30/1800
=》30/1800
=》1/60
=》 the focal length is 60cm
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