JEE Main · PhysicsHard
A plane electromagnetic wave is incident on a dielectric medium with refractive index $n = 1.5$. What is the ratio of the speed of the wave in the medium $v$ to the speed in vacuum $c$?
- A.$0.5$
- B.$0.67$
- C.$1.5$
- D.$2.25$
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Correct answer: B — $0.67$
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