All Questions
18
questions
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
3
votes
2
answers
3k
views
Why does laser light not bend (refract) when it travels from air to water?
I passed green laser light from air to water but to my suprise the light doesn't bend towards normal even though I changed the angle of incidence.It goes undeflected ,Is it because of its higher ...
- 47
2
votes
1
answer
209
views
Do high powered lasers refract differently than other light?
So I have a question: I am told that there are naval lasers that target over 100's of miles ship-to-ship (not ship to air). Someone asserted that powerful lasers would refract differently than light. ...
- 475
0
votes
1
answer
42
views
Refraction of light as seen from a glass of water
When we put a straw in a glass of water the size and bending is more when viewd from side than from up. Is this due to the effect of the glass?
0
votes
0
answers
43
views
Swimming lane line shadow
In an indoor pool, I have noticed a distinctive shadow of the swimming lane lines on the bottom of the pool, whereas people swimming there do not leave shadows.
No shadows of the swimmers can be ...
- 61
11
votes
1
answer
847
views
Refractive index of water
The index of refraction is given by the following formula:
$$
n = \sqrt{\frac{\epsilon \mu}{\epsilon_0 \mu_0}} = \sqrt{\epsilon_r \mu_r},$$
where $\epsilon_r$ is the relative permittivity/dielectric ...
- 665
0
votes
1
answer
42
views
When can I see through water at the beach?
I have some oblique photographs of sandy beaches. I have added a contour at a hue of 120° to roughly divide reds (sand) and blues (water/sky).
Source: https://www.stuff.co.nz/travel/destinations/nz/...
- 103
-1
votes
1
answer
205
views
Factors affecting Refractive index
I have a doubt that with increase in temperature the refractive index is decreasing but refractive index of ice is lower than water????
0
votes
0
answers
19
views
Consider 4 cases of water droplet, ie when water droplet is in sea, in glass, in air after rain, as humidity?
When water droplet is in air as water vapours it scatters blue light, after rain by refraction dispersion and TIR it forms rainbow , in sea it scatters blue light while water in glass ( drinking ...
- 159
6
votes
3
answers
903
views
What is the speed of a photon in water?
What is the speed of light in water? The speed of light in vacuum, divided by the index of refraction for water. And what is the speed of a photon in water?
9
votes
3
answers
6k
views
Refraction: Swimming goggles, short-sightedness, and underwater vision
I have thought of this question due to personal experience. I am short-sighted, and over the last three years my short-sightedness has worsened. Taking a lifeguard certificate again now that I did ...
- 191
1
vote
1
answer
354
views
What causes the circular polarization of light from outside Snell's window?
Wikipedia and other sources claim that the internal reflection underwater outside Snell's window is circularly polarized. What is the mechanism that causes this circular polarization?
- 405
6
votes
2
answers
833
views
Glasses underwater
So I figured the refraction of the cornea is based on the index of air and the vitrous humor to make a perfect image. Underwater this is messed with because water has the same index as the eye. Hence ...
- 61
4
votes
2
answers
42k
views
Why is it easier to get sunburnt in the water? [duplicate]
I went today to the swimming pool and I remembered that when I was younger my mom used to tell me to be careful because you get sunburnt much more easily in the water than in the ground.
I never gave ...
- 1,563
2
votes
2
answers
921
views
Mirages under water?
In Polynesian shallow water, the temperature difference from short place to place is so high that one can see the same trouble refraction that exist in air above fire or metal sheet in summer. So I'm ...
- 3,882