Question

What do you understand by the term luminosity of light? Name its old and SI unit. How many times the SI unit is bigger than the old unit?

Answer 1

1. The amount of light given out by a given luminous source is compared with the light is known as luminosity of light.
2. The old unit of luminosity of light is Candle power.
3. The SI unit of luminosity of light is Lumen.
4. One lumen is equivalent to 12.56 candle power.