Sky is Blue Essay

Sky is Blue Essay GD Topic is one of the abstract topic in itself. Many people believe that the sky is light blue just because they have grown up to think only about the color blue when they are asked about the sky. But scientific studies show that the light from the Sun is all the colors of the rainbow.

The light travels in waves and consists of weightless particles that are moving around 200,000 kilometers per second.

 The range of light that our eyes can see is the electromagnetic spectrum. Each color in the spectrum has a different frequency-which is the number of cycles per second. The frequency of light is determined by color. Furthermore, now you know that the light waves coming from the Sun contain all the colors with different frequencies and that the light with a lower frequency has a longer wavelength.

Sunlight, which appears white to the human eye, is a mixture of all the colors of the rainbow. For many purposes, sunlight can be thought of as an electromagnetic wave that causes the charged particles, electrons and protons inside air molecules to oscillate up and down as the sunlight passes through the atmosphere. When this happens, the oscillating charges produce electromagnetic radiation at the same frequency as the incoming sunlight, but spread over all different directions. This redirecting of incoming sunlight by air molecules is called scattering.

Each of the colors is made up of its own wavelengths, kind of like a unique fingerprint. Red has the longest wavelength, violet has the shortest and all the other colors are somewhere in the middle.

The Earth’s atmosphere is filled with gas molecules. As white light from the Sun passes through the atmosphere, colors with longer wavelengths, such as red, orange and yellow, pass through. Blue and violet wavelengths, on the other hand, are absorbed by the gas molecules and scattered across the sky. Your eye sees these reflected wavelengths as blue.

When we view the setting sun on the horizon, the opposite occurs. We see only the light that has not been scattered into other directions. The red wavelengths of sunlight that pass through the atmosphere without being scattered much reach our eyes, while the strongly scattered blue light does not. The longer distance that the sunlight travels through the atmosphere when it is on the horizon amplifies the effect–there are more opportunities for blue light to be scattered than when the sun is overhead.

Clouds, on the other hand, are made of water droplets that are much larger than the wavelengths of visible light. The way they scatter sunlight is determined by how the light is refracted and internally reflected by, and diffracted around, the cloud droplets. For these particles the difference between the scattering of blue and red light is not nearly as large as it is for gas molecules.

You can tell them that colors enter our atmosphere causing some to get scattered by the oxygen atoms. As the scattered light enters our eyes the blue light that was scattered is more easily activated by the rods and cones in our eyes that help us see light.

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