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Which of the following is the only safe way to observe the Sun without the use of a telescope and a solar filter?
Indirectly by projecting the image onto a surface.
Directly while wearing your sunglasses.
Directly with your naked eye as long as you don’t look at it too long.
Directly through a magnifying glass.
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Which of the following is the only safe way to observe the Sun without the use of a telescope and a...
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