General Science
10th Physics - Refractive Index
The speed of light in vacuum is 3 × 10⁸ m/s. If the refractive index of glass is 1.5, what is the speed of light in glass?
निर्वात में प्रकाश की चाल 3 × 10⁸ m/s है। यदि कांच का अपवर्तनांक 1.5 हो, तो कांच में प्रकाश की चाल क्या होगी?
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Official Solution & Conceptual Rationale
Class 10 NCERT Science - Chapter 10
Refractive index n = c / v. Therefore, v = c / n = (3 × 10⁸) / 1.5 = 2.0 × 10⁸ m/s.
v = c / n = (3 × 10⁸) / 1.5 = 2.0 × 10⁸ m/s।