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Home Q & A Board Science-Related Homework Help Physics
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barry barry
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11 years ago
How can interstellar dust block starlight in spite of its extremely low density?
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11 years ago
"Each gain of dust only blocks a tiny amount of light, but over billions and billions of miles, the total number of particles the light encounters becomes significant."
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11 years ago
The grain size of the dust is comparable to the wavelength of the light blocked, so scattering of light is possible.  Also, clouds are so vast that even at low density they contain a lot of dust.
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Eric Clapton
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barry Authorbarry
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11 years ago
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