The speed of light in air is 3 x 108 m/s. In medium X its speed is 2 x 108 m/s and in medium Y the speed of light is 2.5 x 108 m/s. Calculate:; (a) airnx = ?; (b) airny = ?; (c) any
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2×108m/s and 2.5×108m/s
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