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13
votes
2answers
632 views
What is the inverse-square law, and how does it apply to lighting for photography?
I hear photographers talk about the inverse-square law, particularly with reference to lighting.
What is this law about, and most importantly, how is it applied to lighting for photography?
12
votes
2answers
3k views
What is the difference between luminance and illuminance?
The more I read about this, the more confused I become. Illuminance, as I understand it, measured in lux, is the perceived brightness of light on a surface. It's what you'd measure with an incident ...
7
votes
2answers
820 views
What is “solid angle” and how does it relate to photography?
So, I was hanging out in the chat room, and hear mention of something called "Solid Angle". What is this, and how can it be important?
