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आँख में प्रवेश करने वाले प्रकाश की मात्रा को कौन नियंत्रित करता है

Asked Nov 28, 2017 Modified Aug 13, 2023 Viewed 0 times

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Gk physics-gk

asked Nov 28, 2017 at 08:01

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परितारिका

answered Aug 13, 2023 at 19:20

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