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I am not sure if anyone said this yet, because I am too busy (read lazy) to scan through all the replies, but Wolfram's Mathematica is quite possibly the best commercially available math software. I can say it is definitely worth the money.
- Thu Aug 27, 2009 6:12 pm UTC
- Forum: Science
- Topic: Does light exert gravity?
- Replies: 69
- Views: 7473
Photons do not have a mass. That said, they are affected by gravity, which is the reason behind gravitational lensing and black holes being "black." MIB24601 explains it well. Light does, however, exert pressure. (See Radiation Pressure)