Why is the moon reddish-brown during the total phase of the lunar eclipse?

The reddish-brown color of the Moon during a total lunar eclipse is due to the large scattering of the blue part of the spectrum and less scattering of red rays as they pass through the earth’s atmosphere. The greatest effect takes place for the rays of the Sun tangential to the Earth. This fact is well known. During sunrise and sunset, the Sun and Moon are red.

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