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15 June, 06:10

A light ray traveling in air enters a second

medium and its speed slows to 1.71 * 10^8 meters

per second. What is the absolute index of

refraction of the second medium?

(1) 1.00 (3) 1.75

(2) 0.570 (4) 1.94

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Answers (1)
  1. 15 June, 06:32
    0
    Light travels at 300,000,000 meters per second, in scientific notation 3 * 10^8 meters per second. Note that in the medium it travels at 1.71 * 10^8. Taking the ratio of these two numbers with the final speed over the initial speed, we get (1.71*10^8) / (3*10^8) = 1.71/3 = 0.57

    Your answer is (2) 0.570
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