SELECT * FROM question_mgmt as q WHERE id=3752 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=261 and ex_no='4' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Light - Reflection and Refraction find the power of a concave lens of focal length 2

Question:

Find the power of a concave lens of focal length 2 m.

Answer:

Given,

Focal length of concave lens, f = - 2 m

Power of a lens,

a negative sign is due to the divergent nature of the concave lens.

Hence, the power of the given concave lens is −0.5 D.


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