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When is the power of a lens negative?

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प्रश्न

When is the power of a lens negative?

अति संक्षिप्त उत्तर
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उत्तर

The power of a lens is negative when the lens is a concave (diverging) lens. Its focal length is negative.

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अध्याय 4: Refraction of Light - EXERCISE-3 [पृष्ठ ९९]

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गोयल ब्रदर्स प्रकाशन A New Approach to ICSE Physics [English] Class 10
अध्याय 4 Refraction of Light
EXERCISE-3 | Q 9. (b) (ii) | पृष्ठ ९९
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