Bending of light | Laser bending demonstration | Science Experiment video

BENDING THE LIGHT USING WATER-- COOL SCIENCE EXPERIMENT WITH LASER
All our school life, we've been taught that light travels in straight lines. Here's a cool experiment that'll prove that light can also bend. Or so you can make people think ;)
For this experiment, you'll need:
• Empty bottle
• Water
• A screw driver or any pointed thing
• A laser
• A bowl
Procedure:
• Take an empty bottle and punch a hole on the surface of the bottle.
• Make sure that the hole is made in or around the midway of the bottle.
• Put the bottle into the bowl and fill the bottle with water.
• The water starts flowing out of the bottle through the hole.
• Using the laser project the beam horizontal to the hole from the other side of the bottle.
• Notice that the laser beam follows the laminar flow of water stream.
• And the beam crashes down along with water into the bowl.
Explanation:
First things first, in this experiment, technically, the light does not bend. Observe the laminar flow water stream coming out of the bottle. When the water is in laminar flow the water stream acts just like fiber optic and carries the light. When the light beam hits the water stream, the laser light gets reflected inside the stream. Remember the surface of water is reflective both on its surface and below the surface. This underside reflection of water is usually seen in darkly lit environments like a fish tank).
When light leaves a denser material, in this case water, due to the change in speed it will change directions. However, when a certain angle, called critical angle, is reached, it reflects back.
Critical angle is the smallest angle of incidence for which light is totally reflected.
Total internal reflection is a phenomenon that happens when a propagating wave strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.
Critical angle of water is 48.8 degrees. When the angle of the beam crosses the critical angle the light does not go out of the stream and total internal reflection takes place. At the end of the stream, there is a lot of turbulence, so the continuous reflection chain breaks or scatters down and the laser light gets scattered.
Because of this phenomenon called total internal reflection, the light appears to be traveling along with the water stream.

[@Lightblue2222]

the light isnt actually bending in this experiment, if you listen to the video it straight up says it only appears to bend but doesnt actually bend.

[@ayushjazzusingh]

I wish I got to know it some months ago... I could have impressed my practical examiner with awesome stuff !

[@K_R_N.]

The instructions were unclear so I accidentaly wound up with a bong instead.

[@TheWormzerjr]

so whats the problem?

[@Competitive_Antagonist]

Flat Earthers wouldn't call it a gravity bong. They'd call it a buoyancy bong.

[@jamessomying]

Oh no,that's terrible.Hope your chilled out now.

[@GreatValueEntertainment]

KRN hahaha

[@DrBored2047]

you really helped me on my school project

[@thestealthyassassintsa7403]

Yeah, same here!

[@mohammedahmedshaikh4652]

Same here

[@kaylierblx888]

Thanks!I'm totally going to use this at my school.I can get a 100 in sciene or social studies grade for doing a project this will surely do it!!!!

[@piyushrathore4856]

I was confused before watching this video bot now the topic is clear.👍🏻 Thank you Sir

[@MichysWorld]

Thank you You helped me with my project

[@brittfosh0]

Light actually can bend. A beam of light called the airy beam actually bends in air on its own. At CREOL at UCF they used a beam and a spatial light modulator to program the light to bend whenever.

[@sushilkhatri116]

cool experiment!! I am gonna try this out.

[@lalitamalik8672]

I know already that light bends. But you also show the experiment that light bends. It's really coool. Thank u 😊

[@hili467]

i'm not quite sure I understand how to apply the angle aspect. In the demonstration the beam of light is parallel to the ground, and it's aimed at the opening of the stream. Where does the 48.8 degrees come in? Should I imagine the arc of water broken down into little straight segments, and determine the angle of the segment relative to a line perpendicular to where the beam of light strikes the segment?

[@elearnin]

Thanks...So glad you liked it :)

[@drumroll7073]

1 like after 6 years. how is it feeling?

[@mank004]

@@drumroll7073 much better after 7 years

[@drumroll7073]

No one liked this comment since 7 years, I did so he feels better.

[@FlatEarthMath]

To improve this demonstration, use a hot needle or soldiering iron and melt a perfect hole in the side of the bottle. You want water flow that is like a perfect extruded curving cylinder (like toothpaste), not turbulent flow that is actually breaking into thousands of droplets soon after exit. :-) Cool demonstration, and fantastic explanation! :-)

[@___underdogtrucking9377]

Flat Earth Math i believe this is how the sun works...

[@shaldonalvin]

this would probably help my science fair

[@VeilerDark]

make a huge bubble bending, a long length slow frequency tempo enter-inside that light loop you can enter inside a semeperiod, if you bend it like that - from a boson you have then a fermion, your machine is inside that

[@adlyadamful]

Can we use normal light instead of laser ?

[@ogunladefolawiyoomolara5506]

It helped a lot thanks 10/10 in my project

[@espanajv]

Terrific Explanation!

[@wyattgoldberg6354]

this is really helpful for my child

[@kylerandolph79]

I want to see the wall to the left. Because you can put a flashlight up to a gallon of water and it will lumanate the entire bottle, does that mean I can bend light up, down, back, and diagonal?

[@Mr_BotBroskiroblox]

thanks for the A helped me in my school a lot

[@scienceclub7567]

Can I take this as working model in science exhibition plz tell me the laser light should pass in dark place r in exhibition it will be light na is it available 😟plz give reply sir

[@nigel5075]

Thanks for the video

[@Kakifruit194]

This explains the northernlights!

[@SATYAMPATEL-mm7bk]

But where bending of laser beam will use??

[@bhavyagoswami900]

Awesome. Very well explained and demonstrated.

[@Ujaididida]

it works like fiber optics

[@dajanakorca944]

SUPER that helped me so much. This was the topic of my project. THANK YOU! :)

[@girishjain4361]

Very nicely expressed

[@marioblasalegria]

Good for us the people we come up with it first hahaha love my country

[@Competitive_Antagonist]

It would be cool to make a hydro-optic cable instead of a fiber optic cable. Probably not practical, but a fun way to demonstrate the similarity of the physics. I also wonder how the optics would change with different liquids. I know water has a certain reflection index, but it would be interesting to see this done with a collection of different liquids like ethanol, or PG. I guess it would still work, but I'm no physicist.

[@ubercoo]

Here's a similar video when I went into a dive into reflective transfer of information. Playing music through a laser into a stream then to a pool with a detector & routed to a speaker. kzbin.info/www/bejne/iqvVXmimZ82hhNU

[@Horus666]

Laser vs water = Spirit vs matter... same trap!! 😉

[@sunithazcookingworld8697]

Wow, thankyou

[@armaanmathur2801]

Very amazing🤩

[@HDsharp]

Can the course of a laser beam be affected by another more powerful laser beam??

[@mohammedahmedshaikh4652]

No

[@nainarejy3836]

Thank u so much u help me a lot

[@Xxoax]

Super cool.

[@PeterPete]

All our school life, we've been taught that light travels in straight lines. Here's a cool experiment that'll prove that light can also bend. Or so you can make people think. That means you're either lying to me by making me think that light bends or my school lied to me. Light does not bend, in this example, only the water in which the light travels bends.

[@jamespotter6754]

+Peter Peterson That was just a joke. And you already quoted the proof "Or so you can make people think"

[@jamespotter6754]

+TG GrinD Please tell me you're trolling because this makes no sense.

[@jamescole893]

It is reflected inside the stream it does not actually bend but it looks like it bends do to the reflective and speed at which the light travels. However, light DOES bend. Just not in this experiment. Any physics teacher will tell you.

[@PeterPete]

@@jamescole893 can demonstrate light bends? yes or no?

[@venktesh6600]

can one get sunlight inside a dark room via a window using this Total Internal Reflection ...?

[@UpsideDownMon]

I really don't get what they mean when they say "it only appears to be bending" how is it not actually bending?

[@TheSweetae101]

@@coetz moving water can not act like a mirror. If it could why wouldn't we use waterfalls for solar mirrors? :)

[@antstudios6893]

Wicked!

[@rajanibhardwaj5861]

its not just bending but reaching the surface of the tub also.. its not bending but going wid d flow f water

[@chintusilwal5181]

red laser really works.....the force of water from the hole should be less with less pressure....thars all

[@wheresosama2792]

that was epiccc

[@lelild1199]

How can I calculate the bord angle alfa from this?

[@blobfish528]

Awesome

[@kiwikainoaho]

Do one on gravity please

[@___underdogtrucking9377]

We live on a flat planet with a dome called the firmament the sun works like this experiment

[@introgauge]

stopped at 1:24 god did it no further analysis.

[@alonatamayomalijan1847]

I'm looking for a sub. proj. for our Science Fair in school, & found this one easy yet cool... o.O I'll do this one...

[@roopagshetty8340]

Aewosme bro

[@luigiboy72]

We're doing this in our class tomorrow

[@jeremy-ws1rb]

Will it go full circle if there was no floor

[@reemg.abraham3495]

Why is the light travelling straight with no bending even though it first went from air to plastic and from plastic to water

[@lioupopo6334]

Does red light works?

[@mohammedahmedshaikh4652]

Yes

[@ciaranmcaree4223]

Good video

[@robossthinking1056]

Me: full the sink with water* Gets a popsicle thing in plastic* * puts in water* *woah it’s blue*

[@payamnet]

that's how they deliver the data on optic cables...

[@nandinimishra3326]

Can we do it by red beam of light and dark place is required?

[@jamessomying]

I filmed the sun through clouds and sun rays on my video are bending and cross over each other. How is this?

[@JohnDoe-td7mu]

Can it work with a red laser?

[@420budographer]

no. I tried it and it does not work. Only with green lasers

[@JohnDoe-td7mu]

Jason Barroso I actually solved the solution. Red lasers dont emit as much light and arent as strong, so you have to do it in the dark to really see it.

[@quelorepario]

John Doe It is not about "strength" but about wavelength.

[@NextGenGamerVG]

+John Doe it does actuallly work w/ red laser

[@scienceclub7567]

Can we use torch

[@lh776]

This was very helpful for my science homework. Thank you for posting. ~Laris Endwolf~

[@michaelchengay8030]

can i use it on my school thesis? reply assap ty

[@duken3767]

I bend laser light any way I want with an optical cable.

[@imullin07]

Btw the water isn't coming out in a laminar flow, it's turbulent

[@rakshatripathy8011]

Richard Mulln are you sure? I really confused.

[@TheSweetae101]

This is true, which is why I commented that moving water can not act like a mirror. If it could why wouldn't we use waterfalls for solar mirrors? :) Science is so behind reality. We should all question the theory that tells us this is an illusion.

[@Altair4611]

Its not actually being bent, its just lighting up the water but it looks fun

[@jasonpettit9984]

Can we send light using electromagnetics,that's the way to travel in time,

[@scienceclub7567]

Which r the colour light will bend tell me only green

[@brookelenz7626]

I doubt this would work with me 1000 mW blue laser?

[@WhiteNavayo]

it would. doesnt matter how strong the light is, the critical angle is the same.

[@robossthinking1056]

Just imagine it as water it made out of millions of mirrors

[@brokemalone7011]

Do you mean REFLECTING?

[@davidfisher3684]

Why pretend that this is some sort of special property of the laser? Any light source within the cylinder will produce the same effect.

[@iancontreras7584]

will a cat laser work

[@gentleharmony7123]

i like it

[@sin9324]

doe it work with red coloured lasers??

[@user-ow3lu5bk4b]

Why not..??

[@luigiboy72]

@@user-ow3lu5bk4b cause it's a different wavelength I guess

[@blazebe4t67]

I CANT UNDERSTAND HOW LIGHT IS BENDING

[@jamespotter6754]

+shane wolf As the light hits the stream its being reflected onto the other side of the stream, it keeps being reflected until it reaches the bottom of the stream that is coming out of the bottle. Just like a fibre optic cable.

[@ayaans3785]

I have the same laser like you

[@anandahananda.h6521]

super

[@GameCreatorOfGod]

this is not bending, this is light reflecting. But its cool.

[@danponlaser7279]

great

[@petrut.1224]

Actually is the same fenomen like the refraction in the optical fiber.This is not light bending, is an illusion.

[@duchessainsoph8078]

Petru Tirnovan I guess that's why he said it "appears" to follow the stream of the water.

[@fai1603]

Lol. I thought it is about the wave-particle duality

[@eaglessword4167]

It's just refraction and reflection of light to bend light extreme conditions should be met

[@markhughes5622]

Refraction and reflection

[@Crusader-Ramos45]

Do laser beams really count as light?

[@martinwashington3152]

some fellas claiming time travel a while back used squirting water jet, laser and some cigar smoke through a vehicles passenger window in essence trying to prove time and faster then light travel.. Well, someone mist have made a mint somewhere because of it was me I'd not be telling others just so they could debunk me in the past planning the future.

[@wanawaniujullu8781]

do I need a laser or a flashlight?????????????????????????????????

[@letsbetalented6045]

You will need a laser for best result..... flashlight will not give a proper result... we can't use flashlight for this experiment

[@davoodali9763]

either experiment is wrong or its title is wrong

[@sandeepkumaryadav4014]

Logic opp-

[@stuff1486]

Wow it really help in my project... it's physics experiment right???

[@rashmikalra8221]

# stuff i guess....

[@desmar7945]

thats not light bending? thats light passing through water....

[@mohamedhassan4282]

might aswell try to make the instructions and the explanation clear

[@amanpreet8036]

It not worked I tried

[@duver_8]

0:34

[@varganokt9226]

Я че один из россии?

[@banerjeen.raghu6883]

Fibre Optic !!!!!!!!!

[@marcelmaks3955]

Bob

[@DauGxchUmpAhz]

How to bend gravity? haha

[@acamiln8354]

Bend light, you will bend gravity.

[@taaseenmurshed2514]

I put a like on everyone's comment

[@antstudios6893]

I'll do that as well!

[@piyush.mantur]

So??

[@marcelmaks3955]

bob

[@blazebe4t67]

BUT ITS NOT BENDING

[@jamespotter6754]

+shane wolf Thats what he said...