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Does light have substance? What's it "made" of?
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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?
Started by thedocBoard Physics, Astronomy & Cosmology |
Replies: 9 Views: 32768 |
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Why do we need to light the rocket fuel for a rocket to take off?
Started by GlentoranMarkBoard Physics, Astronomy & Cosmology |
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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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Replies: 10 Views: 48510 |
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What is Time? If there was no light would Time cease to be?
Started by londounkmBoard Physics, Astronomy & Cosmology |
Replies: 328 Views: 194937 |
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