Luminous intensity
Luminance
Illuminance
Luminosity
Luminous flux
Ok, I have heard about brightness and intensity and I know what they are, but... I looked in Halliday - not a single one of these words show up in the index. So I'm doing something wrong I thought, and clearly my undergrad optics course was a rip-off, since we never learned anything about those things. Then I read that someone recommends a book by Hecht, well guess what - same thing, it's got nothing on anything that starts with an "Lu".
Please tell me that there's nothing to worry about and this sort of thing won't be on PGRE
