This is a great inquiry as it includes huge numbers of the riddles that spurred investigation into the material science of light in the mid twentieth century.
The short answer is that the ocean is blue as a result of the manner in which water retains light, the path particles in the water dissipate light, and furthermore on the grounds that a portion of the blue light from the sky is reflected.
Yet, to clarify what I mean by that, I need to reveal to you somewhat about light and material science.
How light functions
To begin with, we have to know some pleasant realities about the idea of light.
The light we see, which we call white light, is comprised of inconceivably small particles called photons. A photon is significantly littler than an iota. You can't see them, yet they're there.
These particles are peculiar in light of the fact that when we measure them, now and then they move like a minuscule ball and at some point like a wave – unusual, correct?
White light is produced using photons that have various frequencies, some shorter and some more, and together make up all the shades of the rainbow. The photons with the most limited frequency we can see look blue, while those with the longest frequency look red.
So we should consider daylight. The photons stream from the sun and associate with all issue on Earth. Contingent upon what the light contacts, a portion of the photons will get retained or absorbed. Furthermore, some will ricochet back. At the point when they skip back, we call this "dispersing".
The photons that get dissipated are what gives things their shading. For example leaves are green, on the grounds that the green photons skip back towards our eyes and that is the thing that shading our eyes see. Other shaded photons are consumed by the leaves.
What shading is a glass of water?
Since we discover more about light, we can start to address your inquiry.
Trials have indicated that unadulterated (water with nothing else broke down in it) retains a greater amount of the red light than the blue light.
However, what amount of the red light will get assimilated? Indeed, that relies upon how much water the light needs to go through.
You may be asking why the water in a glass looks clear. It is on the grounds that the glass of water is too little to even consider absorbing more red light waves. To see the impact with your eye, you would need to glance through a glass of water as large as a pool. That measure of water could assimilate a considerable amount of red light, so the water would look very blue.
Presently envision a glass that held a whole sea of water. It would be gigantic! With that much water, you could assimilate a Ton of red light. So it would look extremely blue.
However, with regards to how light cooperates with the sea, there's a whole other world to the story.
First of all, ocean water isn't unadulterated. Ocean water has loads of things broke down in it, similar to salt and little bits of dead ocean animals. These particles in the water mirror a portion of the light before it has the opportunity to build up the full blue shading. The light returning out from the ocean is generally more greenish-blue in shading.
You got some information about the sky. We realize the sky is blue and the ocean mirrors a portion of this light. In this way, indeed, it assumes a job.
It's actual the sky assumes a function in how our eyes see the shade of the ocean. In any case, it's not by any means the only factor.
To summarize everything: the ocean is blue on account of the manner in which water ingests light, the route particles in the water disperse light, and furthermore on the grounds that a portion of the blue light from the sky is reflected.
At last, we have to consider the hour of day and the situation of the Sun in the sky. At the point when the Sun is sparkling splendid, the ocean seems bluer than it does late around evening time, when the ocean looks dim and practically dark.
In the same way as other inquiries in science, the appropriate response isn't as simple as a straightforward yes or no. There are frequently loads of right, yet fragmented, responses to numerous inquiries. To me, that is the thing that makes science so intriguing.