Q 16. Find the focal length of a lens of power – 2.0 D. What type of lens is this?
The lens is concave because it's focal length is negative and is equal to -50 cm.
CBSE Class 10 result 2026 soon; steps to create DigiLocker account to download marksheet
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CBSE mandatory 3rd language rule leaves Sanskrit as only R3 option at many pvt English-medium schools
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