All Questions
9
questions
0
votes
1
answer
341
views
Focal length of lens combination [closed]
The adjacent figure shows a thin plano-convex lens of refractive index $μ_1$ and a thin plano-concave lens of refractive index $μ_2$, both having same radius of curvature $R$ of their curved surfaces. ...
- 149
-3
votes
1
answer
53
views
Problem involving lenses and mirrors [closed]
A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance
between the lens and the mirror is 10 cm. A small object is kept at a distance of 30 cm
from the lens. The final image ...
- 47
2
votes
1
answer
908
views
How to graphically determine equivalent focal length of two thin lenses?
Suppose we have the schematic above. The first lens has a focal length of 80mm and the second one has a focal length of 60mm, and both are biconvex. My job is to determine, graphically the equivalent ...
- 637
0
votes
3
answers
2k
views
Dependence of lens power on the refractive index of the medium
How does the power of a lens depend on the refractive index of the surrounding medium?
- 39
0
votes
1
answer
820
views
Looking through a glass hemisphere [closed]
I've found the following question on IsaacPhysics.org . I've been working on it for a couple of hours but I cannot figure it out.
A looking glass is used to read an ancient scroll. This lens has a ...
- 23
-1
votes
1
answer
109
views
Refraction by a thin lens
What happens if the radii of curvature of the two spherical surfaces of a thin lens are equal?
According to the formula,
$$1/f = (n - 1)(1/R1 - 1/R2) $$
(Where $n$ is the refractive index of the ...
3
votes
4
answers
5k
views
5
votes
1
answer
34k
views
How to determine the radius of curvature of a convex lens?
Suppose there is an equi-convex lens made of glass which has a focal length ($f$) of 30cm. Then, can we not say that the radius of curvature, $R$ of the lens is twice the focal length, i.e. $R = 60cm$?...
- 185
-1
votes
2
answers
5k
views
Lens surrounded by two different materials? [closed]
If have a material refractive index $n_1$ then a lens refractive index $n_2$ then another material on the other side of the lens (but in contract with the lens) refractive index $n_3$. How do I find ...
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