“ 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 |
|---|---|
| Source | A Brief History of Time |
| Topic | speed light mass |
| Date | 1988 |
| Language | English |
| Reference | |
| Note | |
| Weblink | https://archive.org/stream/ABriefHistoryOfTimeByStephenHawking/A%20Brief... |

















