BlueEagle wrote:
Sorry, I did spell it wrong though; "candela" which is the unit for "luminous intensity."
We knew it as "candlepower" in my day.
www.electro-optical.com wrote:
The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.
A "watt" is a measurement of power, in the RS having units of "1/s". It is derived from the equation: watts = voltage x current
1/s = t/s² x s/t, which is the product of force (voltage) and speed (current).
The "steradian" is just the fractional part of the surface of a sphere, which is there to adjust the focus of power along a beam (versus a radiant sphere), so being a percentage, has no units. So "candela" would be the same as "watts", 1/s.
BlueEagle wrote:
Quote:
Mass -- t3/s3 (from E=mc2)
E (energy) usually defined as Joules in legacy physics. Joules = (kg x m2)/s2 or (mass x distance2)/time2
How do you derive the unit for mass out of E=mc2?
Energy = t/s (inverse speed or work, time per unit distance).
"c" is the velocity of light, a speed, s/t.
E = m c
2
t/s = m (s/t)
2
m = (t/s) / (s/t)
2
m = t
3 / s
3
Every dogma has its day...