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Does a bigger star trap more light inside itself than a smaller star?
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If we put a mirror millions of light years away and reflected earth, could we see what earth looked like millions of years ago?
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What is "light" pressure?
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What is a halogen light bulb? What halogen is used and why is this better?
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Is solar energy the same as light energy?
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What is Time? If there was no light would Time cease to be?
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