NEET 2019 Odisha · PhysicsSpeed in mediumPrevious Year Question
For a transparent medium the relative permeability and permittivity µ_r and ε_r are 1.0 and 1.44 respectively. The velocity of light in this medium would be
Answer: (A) 2.5 ×10⁸ m/s. Answer: (A) 2.5 ×10⁸ m/s.
- A.2.5 ×10⁸ m/s✓
- B.3 ×10⁸ m/s
- C.2.08 ×10⁸ m/s
- D.4.32 ×10⁸ m/s
Correct Answer
(A) 2.5 ×10⁸ m/s
Solution & Explanation
Answer: (A) 2.5 ×10⁸ m/s. The speed in a medium is v = c/√(µ_r ε_r).
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