When the weather is very clear, the sky is blue, like a blue mirror, clean and magnificent. Although we often see blue sky, few people think about why the sky is blue. Do you know how the blue of the sky is formed?

The color of the sky is a natural phenomenon, on a clear day, the sky is blue and the color sometimes turns white, especially on the horizon.

Different scientists have many accounts of the phenomenon, however, one such myth has this explanation: the sky is blue just like sunlight reflects the blue from the ocean.

This explanation is incorrect because the same phenomenon that absorbs light in the atmosphere also occurs in water. After all, longer light waves are absorbed more deeply than short blue light.

The most common theory explaining that the sky is blue is the scattering of light by the atmosphere, which consists of gas and other particles that collide with light particles and scatter them in different directions and intensities.

Light is a spectrum of seven different wavelengths of colors, including red, orange, yellow, green, blue, indigo, and violet, with uneven distribution of particles.

Blue light travels in shorter wavelengths and scatters more than other colors as sunlight travels through the air. Blue also has higher frequencies and more scattering than red.

This scattering and rescattering create the effect that the sky appears blue, with light traveling in straight lines in all directions.

During these motions, it collides with gas particles and other matter in the atmosphere, absorbing light and emitting a similar color to the absorbed light.

In the early morning or at sunset, the sky is white or red. The whiteness of the sky is the result of blue light scattering as atmospheric particles move through the air. Scattering spreads blue light more, making it appear paler from a distance.

As the sun lowers in the sky, light travels through more air and even scatters longer light waves, making red light waves more visible. And blue light waves are already more dispersed because they travel a greater distance before reaching the eye.

Nineteenth-century scientist John Tyndall was the first to propose the blue sky theory. Lord Rayleigh elaborated on Tyndall's theory of scattered light in the atmosphere.

Rayleigh did more research on light, eventually concluding that blue light scatters more than red light.

He estimates that blue light is 10 times more diffuse than red. Previously, scientists thought that particles of dust and water in the atmosphere help absorb and scatter light.

These theories are somewhat incomplete because the sky changes color as the dust and water in the atmosphere change.

The color of the sky is also linked to receptors in our eyes, which vary in sensitivity to various color triggers, and the eye perceives colors differently in wavelengths.

Blue receptors are known to be more sensitive than red and green receptors, so we are more likely to perceive blue light particles scattered from sunlight.

The sky on a cloudy and rainy day is gray and white because the main performance of the thick cloud layer is a reflection of sunlight. At this time, the light is weaker than that of a sunny day, and the sky is darker than that of a sunny day.

When the sunlight passes through the thick cloud layer again, due to the large water content in the cloud layer and more dust, the reflected sunlight mainly shows the color of dust and small water droplets or small ice crystals.

So the sky on a rainy day looks grey and white.