Light of the Same Wavelength Passes Through Two Diffraction Gratings

question 112

Multiple Choice

Light of the same wavelength passes through two diffraction gratings.One grating has 4000 lines/cm,and the other one has 6000 lines/cm.Which grating will spread the light through a larger angle in the first-order pattern?

• A)the 4000-line grating
• B)the 6000-line grating
• C)Both gratings spread the light the same.

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