questionedithistorytranslations

Current version

This is the accepted version.
added by I know May 7, 2019, 3:39 p.m.
Is the speed of light photons always constant?
Yes, but only in a vacuum.
No, it depends on the facility.
A speed of light is always constant.
None of the above
The speed at which light propagates through transparent materials, such as glass or air, is less than c. However, this "slowing of the light" is only due to the fact of photos being absorbed and re-emitted after a slight delay between atoms. When a photon is emitted, it's speed is always c. In exotic materials like Bose–Einstein condensates near absolute zero, the effective speed of light may be only a few metres per second.
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-1
Correct this question
www.livescience.com
4
Very interesting!
reach: rather globallightphysicsspacewater

History

This is initial version of the question.
added by I know May 7, 2019, 3:39 p.m.
Is the speed of light photons always constant?
Yes, but only in a vacuum.
No, it depends on the facility.
A speed of light is always constant.
None of the above
Speed of Light May Not Be Constant, Physicists Say. Einstein's theory of special relativity sets of the speed of light, 186,000 miles per second (300 million meters per second). But some scientists are exploring the possibility that this cosmic speed limit changes. The speed of light is constant, or so textbooks say.
I know
reach: rather globallightphysicsspacewater
This is a correction, already accepted and applied to the original question.
added by globalquiz.org June 10, 2019, 3:49 p.m.
Is the speed of light photons always constant?
Yes, but only in a vacuum.
No, it depends on the facility.
A speed of light is always constant.
None of the above
The speed at which light propagates through transparent materials, such as glass or air, is less than c. However, this "slowing of the light" is only due to the fact of photos being absorbed and re-emitted after a slight delay between atoms. When a photon is emitted, it's speed is always c. In exotic materials like Bose–Einstein condensates near absolute zero, the effective speed of light may be only a few metres per second.
globalquiz.org
reach: rather globallightphysicsspacewater

Votes

-1 Incorrect or questionable  Sergiusz Patela
+1 Very interesting!  ---
+1 Very interesting!  Joschi
+1 Very interesting!  Doctor Yes
+1 Very interesting!  ShadowMaster