Definations For Light Sources, Eclipses of the Sun and Moon

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Last updated 12:44 AM on 5/16/26

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Pointed Source

A small concentrated source of light. Eg. pinhole

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Extended Source

A Long Source of light. Eg. Flourescent Bulb

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Rectilinear Propagation

The travelling of light in a straight line

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Eclipse of the Sun

The Eclipse of the Sun occurs when the Moon is the Sun and the Earth

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Eclipse of the Moon ( Lunar Eclipse)

The Eclipse of the Moon occurs when the Earth is between the Sun and the Moon