A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram.
Refraction Lens
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Question

A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram.

KnowledgeBoat · Accepted Answer

f = -15 cm [∵ focal length of concave lens is negative] v = -10 cm [∵ image distance of concave lens is negative] u = ? According to the lens formula, - = Substituting the values we get, The object is placed 30 cm in front of the concave lens.

Science

A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram.

Refraction Lens

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