The natural light that illuminates our planet is produced by the star called the sun, which is located about 150 million kilometers from Earth. The light produced by the Sun travels through the universe at a speed of approximately 300 000 km/s (kilometers per second) reaching Earth about 8 minutes after being released by the explosions occurred.
Photo of solar flares
recorded by satellites
Sunlight is responsible for the life of beings on the planet. Plants use sunlight to produce their own food, releasing oxygen gas, which is important for living beings. We couldn't survive without the presence of oxygen on the planet.
Due to the Earth's rotational movement (displacement of the Earth around the Sun), the sun cannot fully light the earth, in this way, all regions are dark when they are not facing him.
The rotation movement of planet Earth is
the person responsible for the occurrence of the days and nights
Therefore, man, over time, built instruments capable of producing artificial light. Among the oldest we have the lamp and the candle.
Currently, with the discovery and implementation of electricity, objects that produce artificial light are part of most homes. The lamp stands out as the most used object in the production of artificial light. Take a look at some models of lamps used today:
Flashlights are also used in the production of artificial light. They use cells or batteries for the emission of light. See examples:
by Mark Noah
Mathematical
Kids School Team
