13) Calculate the luminosity in watts from the absolute magnitude for the given stars: (a) Sun (M = 4.83)
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- Luminosity can be defined as an absolute measure of radiated power emitted by a light source over time. In astronomy, it gives us the energy emitted per unit of time by a star, galaxy, or any other astronomical object.
- Absolute magnitude is a measure of luminosity. It defines how bright a star would be if it was observed from a distance of 10 pc.
- The relationship between absolute magnitude and luminosity is given by,
Here L is the luminosity of the star and L0 is the zero-point luminosity and has a value of 3.0128 × 1028 W.
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