Explain why is the sky blue? When you got to space, the sky is black but if you look at sky from earth, it looks blue. Why is the sky blue and how does the color change over time?

Answer:

Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

As white light passes through our atmosphere, tiny air molecules cause it to 'scatter'. The scattering caused by these tiny air molecules (known as Rayleigh scattering) increases as the wavelength of light decreases. Violet and blue light have the shortest wavelengths and red light has the longest.

Nitrogen and oxygen make up most of the molecules in our atmosphere, but any gas or aerosol suspended in the air will scatter rays of sunlight into separate wavelengths of light. Consequently, when there are more aerosols in the atmosphere, more sunlight is scattered, resulting in more colorful skies.

Explanation:

the sky appears blue from Earth because of the way our atmosphere interacts with sunlight. Sunlight is made up of all the colors of the visible light spectrum, which includes red, orange, yellow, green, blue, indigo, and violet.

When sunlight reaches Earth's atmosphere, the shorter blue wavelengths are scattered more than the other colors because they interact more with gas molecules and tiny particles in the atmosphere. This scattering of blue light in all directions is what causes the sky to appear blue to us on Earth.

As the sun sets or rises, the light has to travel through more of the Earth's atmosphere, and more of the blue light is scattered out, leaving mostly red, orange, and yellow light to reach our eyes. This is why the sky appears reddish or orange during a sunrise or sunset.

However, when you are in space, the sky appears black because there is no atmosphere to scatter the sunlight and create the blue color we see from Earth.

The sky appears blue because when light moves through the Earth's atmosphere, the shorter blue wavelengths of light are scattered all around the sky. This scattered blue light reaches our eyes from all directions, making the sky look blue to us. In space, since there is no atmosphere to scatter the light, the sky appears black. As the position of the sun changes throughout the day, the color of the sky may also change slightly, but it mostly remains blue.

The sky appears blue because of a phenomenon called Rayleigh scattering. When sunlight reaches the Earth's atmosphere, it contains a range of different colors, including red, orange, yellow, green, blue, and violet. Each color has a different wavelength, with blue light having a shorter wavelength than red light.

When sunlight enters the Earth's atmosphere, the particles in the atmosphere, such as molecules of oxygen and nitrogen, scatter the sunlight in different directions. However, they scatter shorter wavelength light (blue and violet) more effectively than longer wavelength light (red and orange).

The blue light is scattered in all directions by the molecules in the atmosphere. As a result, when we look up at the sky, some of this scattered blue light reaches our eyes from all directions, creating the appearance of a blue sky.

On the other hand, when we look into outer space from the Earth's surface or from a spacecraft, there is no atmosphere to scatter the sunlight. As a result, the sunlight appears as a direct beam of white light, and the sky looks black.

The color of the sky can change over time due to various factors. For example, during sunrise and sunset, the light from the sun has to pass through a thicker layer of the Earth's atmosphere, causing more scattering of the shorter blue and violet wavelengths. This scattering also affects the longer wavelengths, resulting in the beautiful colors we see during these times, such as shades of red, orange, and pink in the sky.