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JEE Advanced 2013 Paper 2

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Question : 5

Total: 60

Using the expression 2d sin θ = λ, one calculates the values of d by measuring the corresponding angles θ in the range 0 to 900. The wavelength λ is exactly known and the error in θ is constant for all values of θ. As θ increases from 00 :

the absolute error in d remains constant.
the absolute error in d increases.
the fractional error in d remains constant.
the fractional error in d decreases

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