“ Only light, or other waves that have no intrinsic mass, can move at the speed of light. ”
Stephen Hawking, A Brief History of Time (1988). copy citation
Author | Stephen Hawking |
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Source | A Brief History of Time |
Topic | speed light mass |
Date | 1988 |
Language | English |
Reference | |
Note | |
Weblink | https://archive.org/stream/ABriefHistoryOfTimeByStephenHawking/A%20Brief... |