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clc
//to calculate difference in deviations
lambda=5*10^-5 //wavelength of light in cm
eplusd=1/6000 //where eplusd=e+d
theta1=asind(lambda/eplusd) //for first order spectrum
theta3=asind(3*lambda/eplusd) //for second order spectrum
difference=theta3-theta1
disp("difference in deviations in first and third order spectra is difference ="+string(difference)+"degree")
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