All Questions
129
questions
0
votes
1
answer
47
views
Directionality of laser light in vacuum [duplicate]
It is well-known that laser light is directional because of coherence from stimulated emission. This means that the light is emitted ONLY in the direction of propagation, and not in any type of ...
0
votes
2
answers
55
views
What exactly happens to a light ray that is incident on the vertex of 2 mirrors inclined at some angle
So the question I had was that if we have two mirrors as shown in the diagram, what exactly occurs to the light ray that is incident on the vertex of the mirror? If we would like to construct the ...
- 1
1
vote
0
answers
37
views
How to determine if an observer can see an object with multiple mirrors?
How do I determine if an observer can see an object with multiple mirrors? I came across this image online and I am wondering if the observer (point O) see the object (point A)
My attempt:
I tried ...
- 187
0
votes
1
answer
45
views
What is a convex-concave lens?
I came across this term while studying for optics, and I'm unsure as to what this means. My thinking is that it might be a meniscus lens, but the text separately give two different models for each ...
- 187
0
votes
0
answers
23
views
Can the physics behind AR glasses be entirely modeled by geometric optics?
If I wanted to get the image of a small LED screen to be reflected onto the lens of a pair of glasses, would an understanding of geometric optics be sufficient to model this scenario?
I ask this ...
- 1
3
votes
1
answer
182
views
Is there a way to determine whether what I see is a source of light, a real image, or a virtual image?
Let's suppose you are in a dark room and see something resembling a firefly. The light it emits is so dim that nothing else is visible. You're told that it's either a real source of light or an image ...
- 1,599
0
votes
2
answers
75
views
Is there a way to calculate the angle between the refracted and reflected rays given the refractive index?
Is there a way to calculate the refracted and reflected rays? I know we use Snell's law to calculate the refracted rays, but is there a formula to calculate the angle of the reflected rays, or does it ...
- 187
2
votes
0
answers
35
views
Apparent position of object in bowl of water
Say you have a bowl of water and you keep an object in it. What would the apparent position of an object inside the bowl from the position of an outside observer? Will the curvature of the spherical ...
- 187
0
votes
1
answer
69
views
Object and Image Distance from Image height, Object height, and focal length [closed]
Is there a way to find the object and image distances from the object height, image height, and focal length? I understand that the magnification is equal to $-\frac{d_i}{d_o}$ or $\frac{h_i}{h_o}$, ...
- 187
0
votes
0
answers
30
views
Is it preferable to say $v$ is " image distance " than to say " image position " in spherical mirror formula?
I was going through spherical mirror formula $1/v + 1/u = 1/f$ where $u$, $v$ and $f$ are named as object distance, image distance and focal length respectively. But while using this equation we do ...
- 1,357
1
vote
0
answers
51
views
What is the connection between Ray (Geometric) optics and Electromagnetic theory optics in fiber optics?
I am currently reading about fiber optics and wave propagation in fiber optics and encountered the following part of Gerd Keiser's Book :
according to the diagram shown, its a general case when the ...
0
votes
1
answer
52
views
Why do certain objects shine only in certain light?
I understand that wavelength is inversely proportional to index of refraction, which causes dispersion of light (red visible light is deflected less than purple), and total internal reflection.
Is ...
- 82
0
votes
1
answer
76
views
Why does this coin disappear from bottom up?
I happened upon this video purportedly showing a coin on a horizontal table receding away from a lens would disappear from bottom up. The explanation via diffraction resolution limit is wrong. However,...
- 1,030
-1
votes
2
answers
440
views
$r_1+r_2= A$ in prisms
In class we derived a result which said that the sum of the 2 angles of refraction in a triangular prism $r_1+r_2$ is equal to the angle of the prism $A$. The proof goes like this
Over here, it is ...
- 252
0
votes
0
answers
66
views
Why is there only one angle of incidence that gives minimum deviation in prism?
On plotting the angle of deviation vs the angle of incidence for a prism, we find that the graph dips only at one point. It is this result that is later used to prove that for minimum deviation to ...
- 252