How does the moon create a solar eclipse

Impulse Physics 4, textbook

Light and shadow 5 With a light source (above) there is only a simple drop shadow. Two light sources (below) lead to a dark umbra and two lighter penumbra. During a lunar eclipse, the moon moves through the shadow of the earth. In 1999 a total solar eclipse could be seen over Austria. When the moon moved completely in front of the sun, the sun's halo, the corona, became visible. The light source decides the shade! If you illuminate a body with a lamp, one side is brightly lit, the other is in the shadow. A point light source creates a sharply delimited cast shadow. The shadow of a broad light source is out of focus at the edge. Two light sources create two shadows. The dark umbra is where the shadows intersect. Where there is only a shadow, you see the gray penumbra. Proper shadow is called the shaded surface of the body. Behind it is the shadow space. Solar and lunar eclipses Solar and lunar eclipses have always been important celestial phenomena for humans. In the past, nothing was known about their formation, but today it is clear that solar and lunar eclipses are only the result of light and shadow. Usually the moon is illuminated by the sun. But certain constellations make the sun or moon disappear. During the solar eclipse, the moon casts its shadow on the earth. The sun seems to be darkening. A lunar eclipse occurs when the moon moves through the shadow of the earth. A total solar eclipse only lasts a few minutes and is rare. The next total solar eclipse will only be visible over Austria on September 3, 2081. Partial (partial) eclipse, in which the moon does not completely cover the sun, is more common. An annular solar eclipse occurs when the moon fails to completely cover the sun due to the changing distance from the earth. The sun still peeks out in a ring shape around the moon. Animals react to a solar eclipse as they do to the night: They go to sleep. Sometimes light rays can also be curved! Rays of light usually propagate in a straight line. But there are also situations in which light rays are bent. If a ray of light flies close to the sun, it will be deflected. Astronomers can observe this in total solar eclipses. Stars close to the sun can be found in a different position than usual. Bodies with great mass, such as celestial bodies, even have an influence on light. This influence is called gravitation, more on page 86. M M 47 Film jv696a For testing purposes only - property of the publisher öbv

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