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  •  Light is incident normally on a diffraction grating through which first order diffraction is seen at <img alt="32^{\circ}" src="https://entrancecorner.oncodecogs.com/gif.latex?32%5E%7B%5Ccirc

 Light is incident normally on a diffraction grating through which first order diffraction is seen at 32^{\circ}.The second order diffraction will be seen at

Option: 1

84^{\circ}


Option: 2

48^{\circ}


Option: 3

64^{\circ}


Option: 4

None of these


Answers (1)

best_answer

For second order diffraction,

\mathrm{\sin \theta 2=\frac{2 \lambda}{d}=2 \sin \theta 1}
=2 \sin 32^{\circ}>1

Which is not possible. Hence there is no second order diffraction.

Posted by

Divya Prakash Singh

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