- #1
Phys12
- 351
- 42
I build the following spectroscope:
However, I'm not sure how it works. I thought that the light entered the slit, diffracted from the CD (because the tracks in them are comparable to the wavelength of visible light) and then we observe the different components in the camera.(https://www.exploratorium.edu/snacks/cd-spectroscope)
The explanation here (https://www.livescience.com/41548-spectroscopy-science-fair-project.html) says that light gets diffracted from the slit by interfering itself forming the interference pattern (the rainbow) and then reflects off the CD and then that's what we see.
Which one is true?
P.S. When I look at light from one angle, I see the following:
https://ibb.co/mSvo1x
But when I rotate it by 90 degrees, I see:
https://ibb.co/j6UsTc
Why is it the case of the orientation of the spectroscope changes the spectrum seen? If the orientation of the slit and the CD are the same, shouldn't it stay the same?
Also, I don't see the same two distinct spectrum when I look at the spectroscope with my eyes, I see multiple in different directions. Why is it different for a camera vs eyes?
However, I'm not sure how it works. I thought that the light entered the slit, diffracted from the CD (because the tracks in them are comparable to the wavelength of visible light) and then we observe the different components in the camera.(https://www.exploratorium.edu/snacks/cd-spectroscope)
The explanation here (https://www.livescience.com/41548-spectroscopy-science-fair-project.html) says that light gets diffracted from the slit by interfering itself forming the interference pattern (the rainbow) and then reflects off the CD and then that's what we see.
Which one is true?
P.S. When I look at light from one angle, I see the following:
https://ibb.co/mSvo1x
But when I rotate it by 90 degrees, I see:
https://ibb.co/j6UsTc
Why is it the case of the orientation of the spectroscope changes the spectrum seen? If the orientation of the slit and the CD are the same, shouldn't it stay the same?
Also, I don't see the same two distinct spectrum when I look at the spectroscope with my eyes, I see multiple in different directions. Why is it different for a camera vs eyes?
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