You excite an unknown gas, and it emits light. Using a 2000 slit diffraction gra

Q: You excite an unknown gas, and it emits light. Using a 2000 slit diffraction gra

Answer is option C) They are identical other than being dimmer and the width of the lines is larger identical position less light width of the max is larger

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Question

You excite an unknown gas, and it emits light. Using a 2000 slit diffraction grating with a spacing d between the slits, you observe lines on a distant screen. What answer best represents everything that will happen to the locations, size, and brightness of the lines if the number of slits is reduced to 1000, but the spacing d is kept the same?

A. Nothing. They are identical.

B. They are identical other than being dimmer by a factor of 4, and the width of the lines remains the same.

C. They are identical other than being dimmer and the width of the lines is larger.

D. The lines move closer to the central maximum, and are dimmer, and are the same size.

E. The lines move further from the central maximum, and are dimmer, and are the same size.

Explanation / Answer

Answer is option C)

They are identical other than being dimmer and the width of the lines is larger

identical position less light width of the max is larger

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You excite an unknown gas, and it emits light. Using a 2000 slit diffraction gra

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