Question

explain this please​

Answer 1

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Answer 2

Answer:

the ans is b) 2.4 x 10^8

Explanation:

suppose the speed of light in the transparent medium is x

n=1.25

n = 3 x 10^8 ÷ x

x = 3 x 10^8 ÷ 1.25

therefore

X = 2.4 x 10^8