All Questions
4
questions
2
votes
1
answer
200
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Use of sign convention two times in ray optics
In this particular derivation of refraction happening at a spherical surface in terms of its radius of curvature , image and object distance and refractive index is done by my book as shown
When we ...
- 441
0
votes
1
answer
165
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Sign Convention in Ray Optics
While solving questions on Refraction due to 2 spherical surfaces the sign of the image formed after the first refraction (here at '$A$') depends whether the image formed is towards left or right side ...
- 35
1
vote
2
answers
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Is optical path length (OPL) usually in units of length, or wavelength?
When I do calculations, I usually define optical path length (OPL) of a path as the integral of index $n$ along a path divided by the vacuum wavelength, so that I can get the phase easily. So for a ...
- 6,273
4
votes
1
answer
865
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Deep confusion with conventions and signs in geometric optics
This is an equation given in my book.
The question is why have they used a negative sign on the LHS?
Now, if you try to derive the mirror equation with simple geometry, you get
1/v +1/u =1/f . I ...
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