explain this please
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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
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