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प्रश्न
Which is not a correct statement regarding ultraviolet radiation?
पर्याय
They produce fluorescence in substances like zinc sulphide.
They do not affect photographic plates.
They are harmful to eyes.
They produce vitamin D, when absorbed by skin.
MCQ
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उत्तर
They do not affect photographic plates.
Explanation:
Ultraviolet radiation affects photographic plates and can produce fluorescence. It can harm the eyes, while ultraviolet radiation absorbed by the skin helps the body produce vitamin D.
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