find the ratio of velocities of light in water and kerosin.nw=1.3 and nk=1.4 ?
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Explanation:
Length of rod = 19.5m=19.5×100cm=1950cm
⇒ Length of each equal part = 65cm
∴ Number of parts of rod =
65
1950
∴ Number of parts of rod =30
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