Using the expression 2dsinθ=λ , one calculates the values of d by measuring the corresponding angles θ in the range 0 to 90°. The wavelength λ is exactly known and the error in θ is constant for all values of θ . As θ increases from 0°
a. The absolute error in d remains constant
b. The absolute error in d increases
c. The fractional error in d remains constant
d. The fractional error in d decreases