All Questions
186
questions
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
39
views
Pointing flash at LCD television creates a weird diffraction effect
I was looking around my room for something with my phone’s flash on, and noticed a very unique pattern reflecting off of the television.
FYI. The flash is white.
Any idea why it diffracts like that?
...
- 390
1
vote
1
answer
57
views
What will be the color of red laser pointer spot on green surface?
I have read this discussion
enter link description here
, yet I want to make things more clear.
In ideal conditions is it true that red laser pointer spot will appear on white sutrface as red while on ...
- 73
0
votes
0
answers
31
views
Property of total internal reflection question
If I create a medium with gradually decreasing refractive index from once face at index 2.0 and other at 1.01, and show a beam of light upon the optically denser side, will there be any losses upon ...
- 21
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
0
votes
1
answer
57
views
If a silver screen works for a movie projector then why not a mirror?
I have a projector and use a white sheet, thumb tacked, and stretched over a wall. It works fine. I went to the movie theater and looked at their screen closely. It was a fine silvery white glitter-...
user265090
2
votes
2
answers
83
views
Is reflected photon the same? [duplicate]
When a single photon is reflected is the same one, or is it a new photon (emitted) while the 'original' photon has been absorbed?
I'm not sure how to imagine a refleced photon - it's not a ball ...
- 209
0
votes
3
answers
78
views
Why no image is formed when an incident and reflected ray intersect?
When two light rays intersect after reflecting from a concave mirror they form a real image.
but what happens if, say, a ray from the head of the object A collide with the reflected ray DA'? It might ...
0
votes
1
answer
70
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
29
views
Minimum Radius of Curvature an Optical Fiber can be bent
Using the thickness and refractive index of an optical fiber, is it possible to know the maximum radius of curvature it can be bent before there are losses due to refraction?
In my research, I came ...
- 187
0
votes
2
answers
141
views
Height of Mirror Required [duplicate]
I was curious about the minimum height of a mirror required to see your full body, and I found out that it was half of your height, in other words the minimum height to view the image = your height / ...
- 187
0
votes
1
answer
51
views
What causes light to scatter in a medium?
My understanding is that all mediums have a complex iindex of refraction where the real component is the "standard" index of refraction, and the imaginary component is the extinction ...
- 203
1
vote
0
answers
31
views
Fresnel Equations and an Opaque Surface?
I'm trying to make sense of what actually happens to light when it interacts with an opaque surface.
The fresnel equations give us the proportion of light which is reflected off the surface of a ...
- 203
0
votes
0
answers
26
views
Non-reflective material becomes reflective why? [duplicate]
Why an object (which is opaque) and non reflective becomes reflective if seen from a certain angle . Like I was seeing
grey plastic it became reflective when I saw it at a near parallel angle to ...
3
votes
1
answer
158
views
Infinite reflection inside a glass loop
If you had a loop made of completely transparent glass (or other material), in the shape of a donut; think atomic collider (but probably not needing to be so large :) ), and you introduced light from ...
