alleryमाध्यमाचा अपवर्तनांक पुढीलप्रमाणे परिभाषित केला जातो:
Aमाध्यमातील प्रकाशाचा वेग / निर्वातातील वेग
Bनिर्वातातील प्रकाशाचा वेग / माध्यमातील वेग
Cप्रकाशाचा वेग × वारंवारता
Dप्रकाशाचा वेग × तरंगलांबी
Answer & Solution
Correct answer: B. निर्वातातील प्रकाशाचा वेग / माध्यमातील वेग
n = निर्वातातील प्रकाशाचा वेग (c) / माध्यमातील प्रकाशाचा वेग (v).
प्रकाशाचा वेग दाट माध्यमात कमी होतो, म्हणून नेहमी n > 1 असतो.
पाणी n = 1.33, काच n = 1.5, हिरा n = 2.42.
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