When light is incident on a diffraction grati | vedclass

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(D) The condition for principal maxima in a diffraction grating is given by $d \sin 	heta = n \lambda$,where $d$ is the grating element,$	heta$ is t

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(D) The condition for principal maxima in a diffraction grating is given by $d \sin 	heta = n \lambda$,where $d$ is the grating element,$	heta$ is the angle of diffraction,$n$ is the order of the maximum,and $\lambda$ is the wavelength of light.For the zero-order principal maximum,we set $n = 0$.This gives $d \sin 	heta = 0$,which implies $\sin 	heta = 0$ or $	heta = 0^\circ$ for all wavelengths $\lambda$.Since all wavelengths are diffracted at the same angle $	heta = 0^\circ$,they overlap at the central position.Therefore,the zero-order maximum consists of the original white light.

When light is incident on a diffraction grating,the zero-order principal maximum will be:

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