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- Thread starter shahbaznihal
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Wait, what?

A "diffraction pattern" from a diffraction grating using a laser will consist of more than just one dot on the screen. So how can it even be "

The location of the diffraction dots will follow the standard diffraction equation for diffraction grating.

Zz.

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Thanks for your reply. Apologies for the confusion. What I really want to know is how to calculate the location of the entire diffraction pattern on the screen to place the linear CCD array.

I hope this clarifies the confusion.

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This question makes no sense especially after I've given you the diffraction equation. Why can't you find the location of the spots from that?

Thanks for your reply. Apologies for the confusion. What I really want to know is how to calculate the location of the entire diffraction pattern on the screen to place the linear CCD array.

I hope this clarifies the confusion.

Zz.

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The diffraction pattern is not imaged onto any particular plane. Varying the distance between screen/CCD array and slit(s) will simply result in the diffraction pattern size changing. The diffraction pattern is more cleanly described in terms of angles, not linear dimensions.

Thanks for your reply. Apologies for the confusion. What I really want to know is how to calculate the location of the entire diffraction pattern on the screen to place the linear CCD array.

I hope this clarifies the confusion.

- #8

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Correct. But as a while (the central and the other orders) are located on the same plane as the point source? Assume that you have a point source (the laser), would the entire diffraction pattern be located on the same plane as the point source?The diffraction pattern is not imaged onto any particular plane. Varying the distance between screen/CCD array and slit(s) will simply result in the diffraction pattern size changing. The diffraction pattern is more cleanly described in terms of angles, not linear dimensions.

Thanks for taking time to reply.

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I'm sorry, I don't understand what you are asking- specifically "[...] entire diffraction pattern be located on the same plane as the point source?" doesn't make sense (to me).Correct. But as a while (the central and the other orders) are located on the same plane as the point source? Assume that you have a point source (the laser), would the entire diffraction pattern be located on the same plane as the point source?

Thanks for taking time to reply.

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berkeman

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Assuming a 1-D grating, I would think so...But as a while (the central and the other orders) are located on the same plane as the point source?

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