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symbo symbo
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7 years ago
Compared to the speed of visible light in a vacuum (or in space), its speed in water or in glass is
A)   greater.
B)   less.
C)   exactly the same because the speed of light cannot vary.
D)   much greater.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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7 years ago
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symbo Author
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7 years ago
Thank you, thank you, thank you!
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Smart ... Thanks!
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2 hours ago
Thanks
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