The candela
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13 жыл бұрынThe candela is the SI base unit relating to luminous intensity.
For more information: www.npl.co.uk/reference/measur...)
Produced in association with the Open University.
@AdarshKumar-kr2ux Ай бұрын
VERY GOOD INFORMATION
@saftheartist6137 4 ай бұрын
Thank you
@gregsullivan7408 Жыл бұрын
I'm having trouble understanding the "Nit", which is defined as Candelas per square metre. If it were defined as the amount of power contained in a single steridian, from a light emitting with a 1 candela intensity, divided by area, THEN that would make sense, because then, the Nit would be defined in units of power per unit area. However, the Candela is NOT a measure of power - it is a measure of power DENSITY, so to me, it seems non-sensical to say "power per unit area, per unit area". Help!
@rivaldomariano9317 9 жыл бұрын
thank you!
@hallofries 3 ай бұрын
thank you :)
@divyalalr.k5877 6 жыл бұрын
Useful.. but can you precisely tell why the factor 1/683. . What is special about the number 683?
@wurttmapper2200 5 жыл бұрын
Divyalal R.K Sorry to be late. The candela was originally defined so that it could be roughly the luminous intensity of a wax candle. The factor is introduced so that the current definitiom matches the previous one
@Voivode.of.Hirsir 3 жыл бұрын
Wurtt Mapper That’s the problem with S.I. The new definitions try to be more objective but they’re still arbitrarily modified to fit the old definitions.
@jmchez 3 жыл бұрын
@@Voivode.of.Hirsir I know. For comparison, a Pascal is a very tiny unit for most everyday measurements but we use kilo pascals a lot. Amperes are rather large but we use miliamps a lot, also. They could have said 1 watt per steradian and we would use milicandelas. But they made it weird by introducing that 1/683 number.
@sohelakhanom2093 2 жыл бұрын
11 years
@LAnonHubbard 8 жыл бұрын
Helpful.
@mehrajahmadbhattt 11 жыл бұрын
good
@fearoftehdark 11 жыл бұрын
1st
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