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The sky does not go from total darkness to day light at sunrise nor does in go from dayligh t to total darkness at the instant of sunset. Refraction of sunlight in the atmosphere gives a period of light at dawn and dusk which affects the length of the daylight hours.

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How refraction of light elongates the length of day?

When light enters the Earth's atmosphere at an angle, refraction causes the light to curve slightly. This bending effect can make the Sun appear higher than it actually is, leading to an elongation of the day, especially at sunrise and sunset. This phenomenon is more pronounced near the horizon due to the larger path length through the atmosphere.


Why does the length of day light changes from day to day as it revolve around the sun?

due to elliptical shape of earth,the size of days and night are vary


Which explains why sky appears blue on a sunny day?

Due to refraction of light.


How do you use the word refract in a sentence?

The bevel of the window made the light refract into a rainbow.


How does the speed of light have to do with the length of the day?

The speed of light is constant and does not directly affect the length of the day. The length of a day is determined by the time it takes for the Earth to complete one full rotation on its axis, which is approximately 24 hours. This rotation period is independent of the speed of light.


Does length of day light affect roosters being fertile?

no


Does the length of day light change every 7 days?

No. It changes every day.


What causes rotation and revolution?

Length of the day, Direction of sunrise, and change from light and day.


Why do distant objects ripple on a hot day?

Distance objects can be seen to "ripple" on a hot day because of refraction. As light from a distance object makes the trip to the observer, it passes through air of slightly varying densities. This causes it to "change course" to a degree, which is refraction. It is this thermally induced refraction that is responsible for the "ripple" we see, and for the mirage we sometimes hear about.


How much light should you let get into your eye a day?

A length of 500 m a day maximum


Why does the length of the day and night vary from planet to planet?

Because of the difference in speed of rotation of each planet.


How many hours of light are there in a day?

The length of the day varies depending depending on latitude and season (Winter, Fall, etc.)