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What is the nature of the mirror having a focal length of -20 cm? - Physics

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प्रश्न

What is the nature of the mirror having a focal length of -20 cm?
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उत्तर

The mirror having -20 cm as its focal length is a concave mirror because the focal length is taken negatively only in case of a concave mirror.
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पाठ 6: Light - Spherical Mirrors [पृष्ठ २५८]

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फ्रँक Physics [English] Class 9 ICSE
पाठ 6 Light
Spherical Mirrors | Q 22 | पृष्ठ २५८
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