What Do You Call the Quantity When You Multiply Light Flux by Detector Area?

[Mu naught]

If you take the Flux of a light source and multiple by the area of your detector you are left with a quantity in units of only watts.

Now this is technically "power", but what is the correct term for this quantity?

 

[mkarger]

If you take the Flux of a light source and multiple by the area of your detector you are left with a quantity in units of only watts.

Now this is technically "power", but what is the correct term for this quantity?

Are you talking about luminosity?

Luminosity is a function of the amount of light output (brightness or flux) per given unit of surface area multiplied by the total surface area.L= b*((d^2)*pi*4)

L=luminosity (watts)
b=brightness or flux ("watts/meters^2")
d=diameter of star (meters)
((d^2)*pi*4)=surface area (meters^2)

It's basically the surface area (m^2) of the sphere multiplied by the brightness per unit of area. Which finds the total output (commonly shown in the form of watts.).

 

[Mu naught]

No, because luminosity describes the total amount of energy emitted by an object.

I'm talking about multiplying the apparent brightness of an object by the area of a detector to get the total amount of energy per second falling on that detector. I believe there is a certain term for this that is not "power" but I don't know what that term is.

 

[mkarger]

I think you're talking about "radiant flux" if you are talking about the amount per surface area unit per second observed by a detector.

 

[pmacias]

The correct term for this quantity is radiant flux. This term refers to the amount of energy that flows through a given area per unit time, and it is typically measured in watts (W). In this context, multiplying the flux of a light source by the area of the detector would result in the radiant flux being measured in watts.