Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Latest activity
Register
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Rap's latest activity
R
Rap
replied to the thread
I
Lumens and actual power of luminous flux
.
Hmm - That might be the case. In other words, knowing the SPD of Illuminant C to within an constant, they would only have to measure it...
Feb 18, 2024
R
Rap
replied to the thread
I
Lumens and actual power of luminous flux
.
The image of the text was copied from the CRC Handbook of Chemistry and Physics, 90th Edition (2009-2010). What I want to do is to take...
Feb 17, 2024
R
Rap
replied to the thread
I
Lumens and actual power of luminous flux
.
Hi - thanks sophiecentaur - "Wouldn't 100% represent no filter in place or a filter with zero loss at its maximum? All filter gels have...
Feb 16, 2024
R
Rap
replied to the thread
I
Lumens and actual power of luminous flux
.
Forgive me, but it's not sorted out in my mind. Can we define "radiant" to mean energy, or power, or power/cm^2/steradian/hz, i.e. NOT...
Feb 16, 2024
R
Rap
replied to the thread
I
Lumens and actual power of luminous flux
.
Thank you everybody for your input, but I still am a bit puzzled by the original problem. I'm trying to find out the meaning of...
Feb 16, 2024
R
Rap
replied to the thread
A
Can someone explain this statement on luminous transmittance?
.
Yes, "white" is a very flexible term. I used to work at a lamp factory, and they had a filter whose transmittance closely matched V(λ)...
Feb 12, 2024
R
Rap
replied to the thread
A
Can someone explain this statement on luminous transmittance?
.
Yes, MacAdam does start out by shining a beam of light from "Illuminant A" through two filters producing two colors, which are later...
Feb 11, 2024
R
Rap
replied to the thread
I
Lumens and actual power of luminous flux
.
Hi sophiecentaur - Thank you so much for posting part of my problem here. I think I can unravel some of it. If you have a beam of light...
Feb 11, 2024
R
Rap
replied to the thread
A
Can someone explain this statement on luminous transmittance?
.
Hi sophiecentaur - I am dealing with MacAdam ellipse raw instrument data, which is used to draw a "just noticeable difference" ellipse...
Feb 11, 2024
R
Rap
replied to the thread
A
Can someone explain this statement on luminous transmittance?
.
Hi sophiecentaur - thank you for your response, but I still need a precise explanation of what that "78%" means when the table says "540...
Feb 10, 2024
R
Rap
posted the thread
A
Can someone explain this statement on luminous transmittance?
in
Other Physics Topics
.
I have a table of wavelengths and percentage values. Can someone explain this statement: "The following pages give percentage luminous...
Feb 10, 2024
Forums
Back
Top