- #1
Joza
- 139
- 0
I am looking for the distance between the 2nd and 3rd DARK fringes on a screen.
Monochromatic, coherent light is shone through 2 slits a distance d apart.
Wavelength is L. Distance between grating and screen is R.
The formula I am using is: [(R(5/2)L)/d - (R(3/2)L)/d]
I am using 5/2 and 3/2 since these should be the number of wavelengths for destructive interference for the 3rd and 2nd fringes respectively.
The formula doesn't seem to be working though. Where have I gone wrong?
Monochromatic, coherent light is shone through 2 slits a distance d apart.
Wavelength is L. Distance between grating and screen is R.
The formula I am using is: [(R(5/2)L)/d - (R(3/2)L)/d]
I am using 5/2 and 3/2 since these should be the number of wavelengths for destructive interference for the 3rd and 2nd fringes respectively.
The formula doesn't seem to be working though. Where have I gone wrong?