All Questions
Tagged with refraction lenses
135
questions
49
votes
5
answers
13k
views
If a lens focuses all incoming light to a point, how do we get 2D images?
How do lenses produce 2-dimensional images, if a lens bends all incoming rays of light to intersect at the focal point? Shouldn't this produce a single dot of light on a screen placed at the focal ...
- 601
3
votes
2
answers
51k
views
Radius of curvature and focal length
Is the radius of curvature of a convex or concave lens longer than the focal length of the lens?
Does the center or curvature affect the focal point in a lens?
- 99
0
votes
1
answer
394
views
Ray diagram for refraction
I'm having trouble finding out any errors in a ray diagram.
The question is as follows:
A ray of light falls normally on the curved face of a semi-circular
plastic block, it hits the horizontal ...
- 149
4
votes
2
answers
4k
views
Arrow that changes direction home experiment
I saw this cool optical effect in a experiment on Youtube:
https://www.youtube.com/watch?v=G303o8pJzls
Could anyone explain to me why the arrow points in the opposite direction?
I have read ...
- 55
1
vote
2
answers
574
views
how to trace light after refraction by a camera lens?
I am a programmer and I am doing a camera simulation, I am stuck in a matter of how to know where arrives every ray of light after traveling through the lens and being refracted. Every point of the ...
- 63
-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 ...
user43487
0
votes
1
answer
7k
views
Refraction through converging lens: finding image distance and image height
So in this situation there is a 1.79 meter tall person standing 30 meters from a 150 mm converging lens and I'm trying to find where the image will form and how tall it will be. My problem is in ...
- 103
0
votes
1
answer
337
views
Broken Thin Lens Algorithm [closed]
We all know the thin lens equation. For $o$ being a horizontal object distance and $f$ being the focal length, the horizontal image distance $i$ is described by:
$$\frac{1}{f} = \frac{1}{o} + \frac{...
- 803
1
vote
3
answers
26k
views
What happens to the index of refraction of a lens if placed in water?
What happens to the index of refraction and focal length of a lens that is initially in air that is then placed in water?
- 909
0
votes
0
answers
1k
views
Difference between the increase in optical path due to refraction and that due to reflection
If we place two glass plates of refractive index $\mu$ and each having thickness $t ,$ on the way of a light ray the increase in the optical path becomes
$$
\left(S_2 P - S_1 P \right)
= 2 \left(...
- 93
1
vote
2
answers
2k
views
Air bubble inside glass
A convex glass lens acts as a converging lens when the medium around it is, say, air which is rarer than glass. But what happens if a "convex air lens" is inside a glass medium? Does it act like a ...
- 404
1
vote
1
answer
219
views
Question about the refraction of Fresnel lenses
If you line up the suns rays parallel to a Fresnel lens, the light is concentrated, and the focus directly underneath. However, what happens if the sun is off to the side, making the light hit at an ...
- 127
1
vote
2
answers
785
views
Good explanation of a real image?
Okay well I've started to study phys chem in school recently and I honestly can't get my head around what a real image actually is I've asked my teacher to demonstrated it but she's quite lazy, and ...
- 21
3
votes
2
answers
831
views
Effect of gas or liquid within a compound lens system
Hi my question is if a compound lens system if filled with gas or a liquid how does it affect the system when compared to the lens system being separated by air alone. Does this affect the focal power ...
- 31
44
votes
4
answers
277k
views
Virtual vs Real image
I'm doing magnification and lens in class currently, and I really don't get why virtual and real images are called what they are.
A virtual image occurs the object is less than the focal length of ...
- 6,927