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The refractive index ( $μ$ ) of glass is found to have the values $1.49, 1.50, 1.52, 1.54 a n d 1.48$ . Calculate the mean value of refractive index.

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Solution

Mean value of refractive index,
$n_{m} = \frac{1.49 + 1.50 + 1.52 + 1.54 + 1.48}{5} = 1.506 = 1.51$ (rounded off to two decimal places)

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