RRB JE practice question
If the speed of light in air and water are 2.40 x 108 m/s and 2.00 x 108 m/s respectively, then the refractive index of water with respect to air is:
From a RRB JE Science practice set · Science
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Correct answer: (C) 1.20
Refractive index of water w.r.t. air = speed in air / speed in water = 2.40/2.00 = 1.20.
हिंदी में प्रश्न
यदि air और water में प्रकाश की चाल क्रमशः 2.40 x 108 मी/से और 2.00 x 108 मी/से है, तो air के सापेक्ष water का अपवर्तनांक क्या है?
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सही उत्तर: (C) 1.20
air के सापेक्ष water का अपवर्तनांक = air में चाल / water में चाल = 2.40/2.00 = 1.20।
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