All Questions
Tagged with refraction water
33
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
1
vote
1
answer
85
views
Change in nature of image: Putting a concave mirror in water vs in air
I was wondering if we put a concave mirror in water, what will be the difference in the image formed by it in air vs water?
Exception: Here I mean except when rays come from infinity (e.g., sun) ...
- 1,064
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
0
votes
1
answer
113
views
What if water had negative index of refraction
I was reading a book of mine that states that if water had a negative index of refraction then we'd see fish suspended in air. Why? Should not we see still it in water but far away respect to its real ...
-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
1
vote
0
answers
63
views
Why do objects appear larger in water? [duplicate]
Why does it look bigger when we see something in the water?
- 11
1
vote
0
answers
46
views
Positive correlation between temperature and refractive index of water?
I am currently doing an experiment on refraction for physics class where I am looking at the relation between refractive index and temperature of water. The result I got was the the refractive index ...
- 11
2
votes
3
answers
401
views
Why does frequency remain the same when waves travel from one medium to another? [duplicate]
I was reading about reflection and refraction on BBC Bitesize and I can't understand why frequency is a constant in the wave speed equation. I can't visualise the idea of it. I know that wave speed ...
1
vote
0
answers
35
views
Thickness and refractive index of silica gel layer between fused silica and water interface
I learned that when fused silica contact with water, a layer of silica gel will be formed. However, I cannot find any reference about the thickness and the refractive index of the silica gel. Can ...
- 31
0
votes
0
answers
45
views
The Refractive Index of Water after Several Heating and Cooling Cycles
If the refractive index of water under a certain temperature, say 20 degreeC, is 1.33334. Will it return to exact the same value after one or several heating and cooling cycles? Or will it shift a ...
- 31
2
votes
1
answer
1k
views
Microwaves in other media
I saw a video on how microwaving grapes make plasma. He said that the refractive index of microwave is about 10 inside the grape. Now, we don't know the wavelength of the microwaves in the grape or ...
user167524
2
votes
1
answer
547
views
What causes these diamonds in water droplets on a screen?
It was raining yesterday and the screen of my iPad ended up covered in varying sized water droplets.
As you can see, the smallest water droplets look transparent, and then as the size increases the ...
- 889
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
3
votes
1
answer
6k
views
Do water waves moving from deep water to shallow water always have higher amplitude?
I've seen many images like the following one that the height (amplitude) increases as the water becomes shallower.
However, I also found some images showing that the amplitude remains unchanged.
So ...
- 131
3
votes
1
answer
2k
views
mysterious waves while boiling water
When you take a container with water and begin to heat it, after a while, you will notice that bubbles begin to form. If you wait a bit longer, you will easily (it's so clear) start noticing smudgy ...
- 7,203
0
votes
1
answer
1k
views
Maximum speed in water
Is there a limit of maximum speed in water? Is it a finite value or the speed in water can take any possible value?
- 149
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
4
votes
1
answer
1k
views
Under water light reflection of air in a cup vs water in a cup
The last time I was on vacation I was drinking on the swimming pool, and after I was finished with the drinks I started playing with the 2 plastic cups I had, and noticed that the air produces a ...
- 141
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
3
votes
1
answer
6k
views
How does infrared light behave through water?
I have a project involving the detection of the presence of water in a cylindrical transparent plastic container (diameter=25cm)
And I cannot put any device inside, so I was thinking of using and IR ...
- 129
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
1
vote
4
answers
2k
views
Does time pass slowly in water?
In water the speed of light is slower than it is in vacuum. By special relativity the speed of light is constant. Typically, for the basic explanation of special relativity a clock which has a mirror ...
- 661
3
votes
1
answer
317
views
Is the IoR of water exactly $4/3$?
The index of refraction of water is commonly cited as $n \approx 1.33$, to varying numbers of decimal places. I've never seen a decimal expansion for this value with any digit other than $3$ past the ...
- 1,787
3
votes
1
answer
3k
views
Reflections in a glass of water
I've noticed that if you take a full glass of water and look from above, through the water, you can't see through the glass sides - instead, you see a reflection. I tried with a laser pointer and the ...
- 125
27
votes
5
answers
16k
views
Eyes open under water
Yesterday I looked underwater with my eyes open (and no goggles) and I realized I can't see anything clearly. Everything looks very, very blurry. My guess is that the eye needs direct contact with air ...
- 3,930