Why is the Sky Blue on Quora?

why is the sky blue quora

Quora does not moderate any questions asked to it, unlike Wikipedia where volunteers continually proof and correct articles in order to create a reliable information source. Quora simply lacks this feature.

Unfairly placing value on questions at the expense of answer authors who spend hours crafting detailed replies would be silly. Quora should devise a system which encourages every answer author who upholds journalistic integrity to earn rewards for maintaining journalistic standards.


As white light from the Sun travels through Earth’s atmosphere, it becomes dispersed among the air molecules by Rayleigh scattering, with shorter wavelengths such as blue and violet being dispersed into many different directions while longer ones like red and yellow remain together and pass directly to our eyes – creating what appears as blue skies during the daytime. This process gives our sky its blue hue.

As sunlight travels deeper into the atmosphere, its light becomes increasingly scattered as it scatters off particles in its path and into our eyes. Over time, all of the blue light becomes scattered away, leaving only red and orange hues for us to view – explaining why sunrise and sunset appear paler as light must travel further through atmospheric molecules to reach us and give more chances for them to scatter the blue rays away.

The color of the sky can also change throughout the day depending on where and when you are. At noon when the sun is overhead, most atmospheric pollution has passed through, leaving behind only blue hues in its path. Higher into the atmosphere however, where gases exist less densely to diffuse light further reducing blueness as well as gray or even black skies due to reduced gas production in our atmosphere.

Rain also plays an integral part in shaping the sky’s hue; raindrops act like tiny prisms when exposed to sunlight, dissecting its spectrum into its individual colors and producing effects similar to prisms in art galleries or theaters. When this happens, clouds may reflect white light while when absorbing it they turn gray or cloudy in hue. Lightning may strike nearby too and produce spectacular displays. When watching sunset from a beach it often turns red or purple due to sunrays reflecting off water while others absorb by land or atmosphere appear bluer – just another reason to enjoy its spectacle.


The blue hue of the sky can be traced back to atmospheric factors. When sunlight enters our atmosphere it is scattered by gases and particles in the air, with shorter wavelengths (such as blue) being scattered more than long wavelengths ( such as red). This results in light appearing bluer.

As air molecules in our atmosphere are much smaller than the wavelength of visible light, they can easily scatter it using Raleigh scattering – leading to blue skies. Longer wavelengths like sunset and sunrise sunrays don’t get as scattered and can pass through more easily – helping create their reds and orange hues in our daily lives.

Another reason the sky appears blue is the refraction of light. If you shine a beam of sunlight through water it will appear blue because light is being refracted by molecules with lower refractive indices than surrounding waters – giving rise to refracted beams of sunshine that give off blue hues.

Oceans and lakes alike appear blue due to a similar process: sunlight hitting their surfaces is being refracted and scattered similar to how skylight is refracted and scattered, due to water molecules having lower refractive index ratings than surrounding waters.

Blue light can more readily polarized than other colors due to its shorter wavelengths and greater likelihood of destruction by multiple scatterings, providing it with more pure colors than those that don’t polarize as easily.

As the Sun moves across the sky during a sunset or sunrise, its blue light becomes less and less apparent due to having to travel further through the atmosphere and having more opportunities for being dispersed away from you. Meanwhile, reds and oranges come closer together, giving off more yellowish light as it descends towards the horizon.


Raleigh scattering is responsible for giving the sky its blue hue, as this process occurs when electromagnetic radiation – including light – gets scattered by particles in the atmosphere with much shorter wavelengths than those of light itself. It works especially effectively at shorter wavelengths that compose most of visible spectrum colors like blue and cyan.

As sunlight enters the atmosphere, it interacts with gases and molecules of air. Since these molecules are smaller than wavelengths of light, they can effectively scatter it all directions; but most effectively at dispersing shorter wavelengths like blue from visible spectrum rays – making the sky appear bluer!

Sky Blue was not solely caused by this reflection of sunlight off water; another factor is light absorption through longer wavelengths such as reds and oranges which water absorbs, reflected back to us with an unexpected blue hue when struck by sunlight.

At sunrise and sunset, the sky appears different due to sunlight reaching atmospheric layers other than nitrogen and oxygen that scatter its blue light and redirect it elsewhere, creating the appearance of changing hues as the sun crosses across the horizon.

Quora’s thinking on this point is absolutely absurd and perverse: while questions might bring people to its site, answers keep them coming back; thus valuing questions over answer authors is ridiculous and irresponsible.


Answer: Oxygen plays an essential role in creating a blue sky; oxygen scatters light with shorter wavelengths (blue) more readily than long wavelengths (reds). This process, known as Rayleigh scattering, causes blue light to be spread more than red light, which causes it to reflect off surfaces more strongly causing it to be scattered than expected and result in its overall blue hue.

But, the sky isn’t truly blue – it is made up of various different hues and effects coming together to produce its hues and effects. Rayleigh scattering contributes to its blue hue while ozone in the air adds red hues; additional factors like clouds, dust, pollution or pollution contribute to its coloring as well. These effects can result in grayish and dull haze making the sky appear gray rather than blue.

As sunlight hits Earth’s atmosphere, its light is scattered by gases and particles present. Blue and violet wavelengths are scattered more often than longer wavelengths like red or green – this explains why our eyes are most sensitive to blue light – thus producing that distinctive blue sky appearance.

Sunlight can pass through ozone in the air, which explains why we often see yellow or even purple skies at dawn and dusk. Long-term exposure can damage lungs; to protect yourself and keep yourself safe it’s wise to limit how often ozone enters our environments.

Pollution in the air also contributes to making skies grey and dismal, coming from sources such as cars and power plants; some forms are invisible but highly irritating to lungs.

Reminding everyone that Quora questions are simply tools for drawing in viewers is critical; answers to those questions is what keeps people on the site and generates advertising revenues. Quora’s misplaced and mistaken belief about questions’ value shows their team prioritizes advertising revenue over journalistic integrity.

Quora does not enjoy a high level of trustworthiness, so I would only recommend it as entertainment value and even then only occasionally. Trusting its results to the same degree that one might trust Google search results may not be wise.

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