For the first order diffraction in the optical grating which of the following condition is required for the constructive interference?

For the first order diffraction in the optical grating which of the fo

1.	For the first order diffraction in the optical grating which of the following condition is required for the constructive interference?
A.	Sin‚âà√≠¬¨¬±=1
B.	Sin‚âà√≠¬¨¬±=2
C.	Sin‚âà√≠¬¨¬±<1
D.	Sin‚âà√≠¬¨¬±>1
Answer» D. Sin‚âà√≠¬¨¬±>1