Timeline for Why do we need to define both luminous intensity and illuminance?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 9, 2018 at 21:34 | comment | added | gen-ℤ ready to perish | I drew a two-dimensional diagram and looked at “photons per steradian” versus “photons per metre of arc length” and everything—why luminous intensity is the same at all distances, why we look at illuminance—clicked for me! | |
| Apr 9, 2018 at 21:31 | vote | accept | gen-ℤ ready to perish | ||
| Apr 9, 2018 at 14:34 | comment | added | Farcher | @ChaseRyanTaylor Because the surface is not a "point" source. | |
| Apr 9, 2018 at 14:27 | comment | added | gen-ℤ ready to perish | Followup question: Why do we not just look at the ‘lumens per steradian’ back off of a surface if we look at the ‘lumens per steradian’ form the source? | |
| Apr 9, 2018 at 5:33 | comment | added | gen-ℤ ready to perish | [+1] Direct and concise. Speaking of perceived brightness, here’s this.... | |
| Apr 9, 2018 at 4:24 | history | edited | Farcher | CC BY-SA 3.0 | added 9 characters in body; added 5 characters in body |
| Apr 9, 2018 at 4:18 | history | answered | Farcher | CC BY-SA 3.0 |