Why Is Water Blue? | Forces Of Nature | BBC Earth Science

The glacieral waters of Iceland are so pure that they are perfect for understanding why water is blue. With such good visibility, professional diver Ted Whittnal can see the importance of photons and light at different depths of the ocean.

Taken from Forces of Nature.

[Danin]

This is why many deep ocean creatures tend to be red colored. They become less visible. Many of them are also as transparent as possible to avoid predators.

[Ellygator]

Interesting to see the colors vary with depth, thanks for the documentary.

[lornalong]

It is not only deep water that reflects blue.

I was always enchanted by the colour of ice and you don't need large glaciers or big chunks of ice to see the effects.

Take a look at photos of Sweden's Ice Hotel and you will see the clear ice carvings, blocks of ice & chandeliers reflect blue.

When you look at these carved ice rooms, they mostly look white to the naked eye.

But when you take a video or photograph they reflect far more blue, especially where the ice is clear as opposed to 'frosted'.

I would think there is less 'photon vibration' in ice absorbing red & yellow wavelengths and the little pieces of carved ice chandelier do not require a 'depth of water' to return the blue colour.

Our atmosphere reflects blue back to us on earth on a clear sky day, even though we know the depths of space beyond are pitch black.

Interesting & beautiful.

[daemondsconcero]

Thank you, I have used the solar eclipse and why is colour blue information to form the concept for a song.

[wmarclocher]

Okay, so red is absorbed by the water, that still leaves green and blue of the primary emitted colors and since our eyes are twice as sensitive to green (having twice as many cones in our retinas) why wouldn't the water look green? Or did I miss something?

[Santosh]

Great explanation thank you, bcz she is perfect in Blue no matter science whatever say...

[LoneWombat]

That crystal clear water looks amazing and absolutely tranquil. I truly hope it will stay this pristine forever without tourists ruining it.
I will say, however, that you still didn’t really explain why water is blue. 🤷‍♀️

[fatoucarriekinney]

Some languages don’t have a name for blue. Languages that do have a name for blue also have 4 others: dark/black, light/white, red, and yellow or green.

[skorpnikusclaw]

Why is this an edited version of the one with brian cox of 2016? Some shots are literally the same! Which is the original?

[madcowk]

So there are different color photons? I thought a photon was a photon and the eye receptor changed based on the wavelength (rods and cones). Does she mean the red wavelength gets swallowed up, and maybe the density of the water changed the speed of the wavelength further to the point of bending the red out? Interesting vid. Thanks.

[johnleos]

Great explanation, I get it! Water absorbs/filters out light color
but BLUE gets through the filters! Another interesting video! Keep up the great work! Enjoy these interesting videos 🤠🇺🇸

[jenniferlaflora]

Notes 📝: 0:17 0:18 all the rainbows plural 0:31

[terryadkins]

The blue from the sky reflection on the water, next question please

[jondoeami]

Who else was today years old when they learnt of this

[memyselfyo]

Can’t this be explained using the same rationale used for why the sky is blue, I.e Rayleigh scattering? Vibgyor, or violet blue green yellow orange and red comprise the rainbow, or visual light spectrum. The colors that any medium doesn’t absorb, are re radiated outwards, giving said medium its color. The sequence is from low wavelength to higher, which is why at sunset, when the suns rays traverse a greater relative distance, the sun now appears orangish.

[containedhurricane]

So, there are lives in other blue planets? Since the color indicates water

[jenniferlaflora]

0:12 space the blue because it is iconic Jennifer 0:28

[teej]

Ohhh I see in the wide array of colors the photons that make up the color blue doesn’t fade out as the rest no matter how deep water goes down and penetrates and so when seen from above ⬆️ the blue photons are still visible way way way up even into space and that’s why water 💦 appears as blue because outta all other colors of the beautiful spectrum of light it never fades out and never dissipates! Wow that’s absolutely amazing, what an amazingly awesome-inspiring almighty God I am so blessed to know and worship! - Romans 1:20💙🩵💙🩵💙🤍

[devrim-oguz]

So, the water knows where it is because it knows where it isn’t

[jenniferlaflora]

But that’s true Jennifer hard Erica Barrera lay hands on me that’s Ana Gallardo may spelled it wrong and so if it’s a location it’s like fiction but no that’s just as atheistic 0:49 t shirt sold twice in a location the pytha of the gorean 0:49