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3
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
0
answers
231
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Is sign convention necessary in the following equation?
The above diagram is used to derive the following equation which is about the refraction due to the spherical surface.
$$\frac{n_2}{v} - \frac{n_1}{u} = \frac {n_2-n_1}{R}$$
The above equation is ...
- 817
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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