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 allows Class 10 students with basic math to study mathematics in 11th for 2025-26
CBSE announces post-result schedule for Class 10, 12 board exams 2025; apply for answer sheet from May 21
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