Engineering Board Exam Reviewer · Physics · medium

What is the speed of light in water (n = 1.33)?

  1. 3.990 × 108 m/s
  2. 2.256 × 108 m/s
  3. 3.000 × 108 m/s
  4. 1.696 × 108 m/s

Answer

B. 2.256 × 108 m/s

Solution

v = c/n = 3 × 108/1.33 = 2.256 × 108 m/s.

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