The material with the frequency and speed of monochromatic light given is seen to be; water(n = 1.33)
We are given;
Frequency of monochromatic light; f=5.09 × 10¹⁴ Hz
Speed of monochromatic light; v = 2.25 × 10⁸ m/s
Thus, the material should have an index of;
n = 3 × 10⁸ /2.25 × 10⁸
n = 1.33
The material with an index of 1.33 is water.
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