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3.0 \times 10^{8} m s^{- 1}]

2.439 \times 10^{4} c m^{- 1}

4.95 \times 10^{4} c m^{- 1}

24.39 \times 10^{4} c m^{- 1}

49.50 \times 10^{4} c m^{- 1}

None

ANS : 5

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