SELECT * FROM question_mgmt as q WHERE id=3768 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='5' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Light - Reflection and Refraction find the focal length of a lens of power ndash 2

Question:

Find the focal length of a lens of power – 2.0 D. What type of lens is this?

Answer:

Power of lens = -2.0 D

A concave lens has a negative focal length.therefore , it is a concave lens.


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