Sun Color During Day

The Sun is low on the horizon at sunrise and sunset. At these times of the day, sunlight has had to travel through more of the atmosphere to reach us. When light hits the atmosphere it is scattered, particularly when dust, smoke and other particles are in the air.

This scattering affects the blue part of the light spectrum the most. We all know that the standard light source is actually the reference sunlight spectral energy distribution at different times, because the spectral energy distribution has been changing at different times, so the color temperature of the sun is also changing. Let's study the color temperature of sunlight at various times! The color temperature change of sunlight indicates: Sunrise and sunset.

What Causes the Red and Orange Colors? As the sun starts to set, sunlight has to pass through more atmosphere to reach our eyes. More of the blue light is scattered away, leaving the longer wavelengths of red and orange to travel through. In addition, the low angle of sunlight during twilight hours means the light must travel farther through the atmosphere.

This increases the scattering of. Figure (b) illustrates how the color (spectrum) of natural light changes with the time of day. During the day sunlight is more intense and contains more blue than red light.

At sunset (and sunrise) sunlight is less intense and has more red light than blue light. During the day, when the sun is high in the sky, shorter wavelengths of light, such as blue and violet, scatter more efficiently. This is why the sky appears predominantly blue.

However, as the sun approaches the horizon during sunrise and sunset, its light has to travel through a thicker layer of the atmosphere. This slight deficit in blue light means the eye perceives the colour of the Sun as yellow. The more atmosphere the Sun's light passes through, the more blue light is scattered.

Hence, during sunrises and sunsets there is a much greater percentage of red light in the Sun's spectrum, giving often spectacular results. Every morning, it rises golden on the horizon, shines bright white at noon, then sets in a festival of reds and oranges. This great celestial actor, the Sun, changes color before our eyes.

The color emitted by sunlight during the daytime is predominantly white, characterized by a spectrum of colors that corresponds to various wavelengths. This amalgamation of colors can occasionally manifest as flashes of light; specifically, the dominant presence is perceived as brilliant white. The scattering effect caused by Earth's atmosphere can introduce a dynamic range of hues.

An orange or red Sun in the early mornings or late evening is a sight to behold. The sky takes such vivid colors because of a phenomenon called Rayleigh Scattering. It is responsible for the blue color of the sky during the day.

When the sun is low on the horizon during sunrise and sunset, light travels through a greater thickness of the atmosphere.