A physics professor does a demo in class in which a red laser is shone on a diff

Question

A physics professor does a demo in class in which a red laser is shone on a diffraction grating and the resulting interference pattern appears on the blackboard behind. If the demo is repeated, using a green laser pointer instead, how will the interference change?

a. the interference pattern for the green laser will have the maxima spaced closer together than the red laser

b. the interference pattern for the green laser will have the maxima spaced further apart than the red laser

c. the interference pattern for both the green and red lasers will have the maxima spaced the same distance apart

Explanation / Answer

Wavelength of green laser is less then Red leser

so

a. the interference pattern for the green laser will have the maxima spaced closer together than the red laser

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