X17-ch10-fig01

A pinhole projector can be used to safely watch the partial phases of a solar eclipse. It is easily fashioned from two stiff pieces of cardboard. One piece serves as the projection screen. Make a pinhole in the second piece and hold it between the Sun and the first piece. If the two cardboards are held 2 feet apart the projected image of the Sun will appear about 1/4-inch in size. [Drawing by Fred Espenak]

A pinhole projector can be used to safely watch the partial phases of a solar eclipse. It is easily fashioned from two stiff pieces of cardboard. One piece serves as the projection screen. Make a pinhole in the second piece and hold it between the Sun and the first piece. If the two cardboards are held 2 feet apart the projected image of the Sun will appear about 1/4-inch in size. [Drawing by Fred Espenak]

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