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वायु में `4000Å` तरंगदैर्घ्य के एकवर्णी प्रकाश की किरणें , जल ( जिसका अपवर्तनांक `=4//3` है ) में प्रवेश करती है । जल में इनकी तरंगदैर्घ्य होगी :

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वायु में `4000Å` तरंगदैर्घ्य के एकवर्णी प्रकाश की किरणें , जल ( जिसका अपवर्तनांक `=4//3` है ) में प्रवेश करती है । जल में इनकी तरंगदैर्घ्य होगी :
A. `25000Å`
B. `3000Å`
C. `4000Å`
D. `5333Å`
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Correct Answer - B
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