how to find the light intensity?
i looked for it in the internet but i couldnt find
what is the formula to determine light intensit?
doesnt matter if the formula is in candela or luminance
help me please.
i will be having a viva test on my project
thank you
What do you mean? Your questions sounds analogous to what is the equation to find distance/mass/speed. It's something that has to be measured?
Or do you mean you want to find the intensity at distance Y given that you know the intensity at distance X? In this case intensity decreases by the distance squared. So if you are given the intensity at X meters you have to normalize it to 1 unit distance by multiplying the intensity by X^2.
Then you divide the intensity at 1 unit distance by Y^2 to find the intensity at distance Y.
You can combine X and Y in one equation to get:
[New Intensity] = [Given Intensity]*(X/Y)^2
where Y is the distance for [new intensity] and X is distance for [given intensity]