Bending the light - physics experiment
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- Опубликовано: 8 фев 2025
- www.fizik.si
This is an interesting experiment to show the total internal reflection. We get the total reflection if the light enters to an optical less dense material and the incidence angle is big enough. The incidence angle at which the ray refracts exactly along the boundary line, is called the boundary angle of the total reflection. With the total reflection we can lead the light along the curved ways, as optic fibres or water jets. This is physics experiment for science project.
www.fizik.si
Zanimiv poskus za prikaz popolnega odboja. Do popolnega odboja pride, če svetloba vstopa v optično redkejšo snov in če je vpadni kot dovolj velik. Vpadni kot, pri katerem se žarek lomi ravno vzdolž meje, se imenuje mejni kot popolnega odboja. S popolnim odbojem lahko svetlobo vodimo po zakrivljenih poteh, npr. po optičnih vlaknih ali vodnem curku.
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wow, this is pretty amazing. the water stream acts like a fiber optic strand.
Love how 80% of the comments were about how this "isn't light bending". Jeez, it's just a title.
Anyway, neat trick you got there. I remember doin' that at school with a couple mates of mine back when science was fun and not a chore.
I think the principle behind it is the REFRACTION THROUGH A PLANE SURFACE...it is due to the total internal reflection that is happening at each point as the water is bending down, as water has more refractive index than air.
its like an alien taking a pee
Light is made of the photon that needs a medium for traveling. If the light path bend with a medium here because of the refractive index of water and air is different. As a result, light has the total reflection in the water-air interface that compels the light to follow the bent water path.
Yes it works with a regular flashlight, having a dark or dim room will help with the effect.
if a light beam is in a substance with a higher density than the air and hits the edge of the substance at a small angle. It is reflected back into the substance not transmitted out. so because the water's density is higher than the airs and the angle the light hitting the edge of the water is small. The beam stays in the stream and is bent as the stream falls due to gravity.
thats actually really freaking cool. Great job!
All the best to you guys, You deserve a subscribe from my side
Internal Reflection there are some really cool pools and water features that use this for dramatic effects like liquid light.
brilliant, the light didn't come out because of the internal reflection, It follows the flow of a water, and that was awesome.
The velocity of the light particle, photon, in medium, depends on the density and refractive index of an medium. If the density of the medium is too dense, the speed of the photon will decreased and the angle between incident and refracted ray will affected. This is called the principle of reversibility and laws of refraction. Sorry if my explanation is not well. If you have some information need to add, just share your knowledge and explanation about this phenomena. Thx.
are bro
technically that is *not* light bending at all although quick rational would lead a person to think so. actually whats happening here is the laser light being reflected inside the stream of water. remember the surface of water is refeclective both on top and below the surface(you commonly see underside reflection in darkly lit environments like a fishtank. This exeperiment is the equivalent of ahallway covered in mirrors with a lite at one end a 90 degree bank and you seing the light at op end
cool this law is used for fiber internet cable right?
Yes, you're right
Quantum Break nice
Well it's not the law, it's the phenomenon :)
Coolphysicsvideos Physics hii
It's basically fibre optics, looks confusing, really isn't but is still awesome!
Wow sick! Thanks I could do this for my science project lol
I needed to show this to my kids in kindergarten. Thanks so much!
@chronosifter In video description you will find "Total internal reflection". It's been there since june 2009
@armandux1productions i think it comes from the early 1900s when companies started making glow in the dark clocks using radium based paints. the radioactive materials caused illness in long time employees.
@DreamyMr it's like a tunnel of mirrors, of course there's refraction when light changes mediums from water to air. I didn't feel the need to point it out, but thanks :)
Light cant bend this is just total internal refraction, but cool video you can also use fibreoptic cable to do the same
@tuPHwUn you could just reply with a normal less sarcastic comment.I guess youre trying to say that this is refraction. I'm not saying you're wrong. It's right. except we are not really changing mediums, water all throughout. Sure a little light leaves during the tunnel since water is transparent and you see a really bright light at the end because most is reflected to the end and that's where refraction is mostly noticeable which is why you see a green "aura" its shooting off in all directions
@admiralct No fiber optcs, It's water optics
One does not even need a laser to do this. It is an old 'school open-day' demonstration to put a lamp inside a light-tight water container and see the lamp-light 'stream out along the water-stream'.
thanks for this video..it really helped me a lot...cause this is what my partner and I presented to our Physics teacher..:)
Just to make sure you are dead or not after 11years
@ayinozendy not possible seeing as that relies on the sun's light, and you need it to be fairly dark and the light must be pretty concentrated for this to work with this expirament, also, you need light
@RokkerBoyy fiber optics is a sub group of the study of light, the study of light is a sub group of physics.
@juanmora19910209 no, you can't become totally invisible, you can only bend light so that you are percieved from a different spot, like this video demonstrates.. if you hold your hand straight from the lasers intended path, you can't see, but move your hand and there it is..
i knew light bended when it hits h20 but i never knew about this simple experiment. thanks!
wow the guy holding the laser has hell of a steady hand
@jaffey2006 it should be, it definitely works with water at least
here simply the water coming in in a shape of pipe acts as a fibre optic cable as water has higher refractive index than air an the phenomenon of total internal reflection takes place
Shreeswaraj Panchal wrong refraction index of water is a minuscule .0063 🌀 light is bending in phi ratio, NASA lies and we live inside the concavity of the earth.
i did that with a light bulb put the bulb in a box and a pen hole of lite im 50 we did it when i was 15 years old that was a good jod pat your self on the back keep learning
@str8out In video description you will find "Total internal reflection". It's been there since june 2009
just like tiny mirrors in liquid form. bending light takes an enormous amount of gravity like a black hole or a large mass. fiber optics dont bend light they refract it.
@DigBick3 Perfect explanation...
I thought that physics was hard and stupid then suddenly I loved it and relays that physics is the best thing in life.
Water sorta act here as an optical fibre but with maximum loss of light (signals) than compared to an optical fibre, depends on the length & also also on increase of bending.The density of water throughout the coloumn is almost uniform,but in fibre it decreases as we move from centre of axis towards the outer most circumference.
James Eugene Carrey moomozmmbanana
Water not Einstein Theory but you're in space as Water 2 our heaven amazing how easy it is for us to be stumped. All we need is a query in query and some dumb Theory and we can pass the third grade.
Nice explanation of refraction, I could show this to my students.
that's awsome:) the water acts like a optical fibre and bends the light through the water jet :) cool:)
this is "Total Internal Reflection" called in physics
The light only follows it because the light relfecting in the water following the stream.
@morpher44 Yes dude, it works like an optical fiber.
This is unique, but is is simply the light following the core radiance of the water stream. It is more or less a fluid light fiber. That,s ok I still like the idea.
Amazing Science (physics).
How can something that bends be bent?
It is because light is bending that it reflects of the wall of the water stream.
Still a cool video and a great effect +1
This is more appropriately known as Total Internal Reflection.
@MrPur3d you dont need a laser, you can just us a flashlight, lasers give better colors tho
The light is not bending. You've created a very laminar flow stream. When water is in a laminar flow, it reacts just like a fiber optic and carries light. When you moved your finger away from the stream, the water droplets started to break up and became turbulent. Search on RUclips under laminar flow and you will see larger examples. I'm building one that works off of a fire hydrant right now.
i did this long back in 2001 in my college, we used a red laser and also an indicator which turns acid in to base, so that the water color changes once they pass thru the hole. we called this experiment as light mixes with water
Hello sir I need total information about this.... Wt u did in your college in 2001. I also want to try it once plz.... Sir
go on! Steady Shot Pro!
is that really light bending? All i know is that the light is going through multiple internal reflections through the water.
Not bending, try "inner reflection" :)
It is an refraction of a leaser beam.
Eddington's exhausting effort to prove Einstein's general relativity theory was needless, all they needed was a bottle full of water and a laser beam:P
Chantelle says that this is cool!
Coooolll 😎 ....can you tell us how to do this .........Please.......
Great soundtrack choice! lol :)
lol U still alive?
he have three hands amazing physics
I'm pretty sure they know whats going on, judging from the description. They know that it's total reflection, but bending light is a much more PR friendly title...
actually the thing to this... is that.... The Light follows the flow of water.. rawr!!
you know THAT BENDING LIGHT REQUIRE HUGE AMOUNT OF ENERGY
Nice Exp.
@TheDaftpunk02 yeah but not in a Open case.
Lol it just goes through the line of water. I thought light was actually gonna bend.
Why should this be surprising ? This is the effect of medium change; from air to water !!
Did you put anything in the water? I saw another video where the guy put dettol in the water.
its refracting, basically coz water is more dense than air.
This happens due to total internal reflection.
Is there a hole where light is incident.
We should try condutcting optic signals throu water conduits =P Much cheaper than optic fibers
Just like the fiber optics, when we see the light through the fiber optics, the light will follow the fiber optics' direction.
Read up on total internal reflection, it's not that complicated to understand.
next...the suit filled with water for the prototype of the first invisibility suit!
@captainchu
Just like the light in the optical fiber
does it work the other direction. If the laser was beamed into the falling water from below, would the light bend back up to the source?
that's how fountains have colors
@adityasahu96 bending light require huge amount of mass... so I guess you are right.
Beware ! Drinking that water will make you pee green !
hey..Hey tell me how light's way turned into another direction.
@MrPeeepe no...not totally and a common mirror ;)
Can u do the same with a speeding bullet?
I am cirrently coppying dis in my book. My teacher will be happy
Can you kindly upload another video with the lights off..??
Same as optial fibre, isn't it?
our cable wires use the same principle right?
It's a small Chinese Torch reflecting its beam through water & looks as if it is pouring.
but can it blend?
I understand light being bend through a medium but what about actually bending light with no medium.
why is the water going down
read the description before comment
it's a really amazing thing for seeing......
Reminds me of the movie and series Stargate.
I wonder if this is how we might travel in the future. Would this be a worm hole? :) idk just my a thought.
this is how fibre optic cables work due to refraction
Wow! I was fascinated by just looking! I tried it out, and it worked! :F
LOOOOL :) very good idea
the water acts like a optic fiver right?
it's amazing
if i saw this earlier, i might used this on my science project, but too late
well i guess you could say you are bending the straight path of the laser pointero_0