निम्नलिखित में से किसकी तर – McqOptions

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1.	निम्नलिखित में से किसकी तरंगदैर्घ्य बैंगनी प्रकाश से कम होती है?
A.	हरी बत्ती
B.	नीली बत्ती
C.	अवरक्त विकिरण
D.	पराबैंगनी विकिरण
Answer» B. नीली बत्ती

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