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What is luminosity, the amount of energy a start emits in a unit of time, the brightness of a star as seen from earth

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ANSWER

LUMINOSITY

  • The energy that is emitted by the star per unit time is called luminosity of a star

Luminosity of a Sun:-

  • 3.8 × 10²⁶ W.

SI unit :-

  • It is measured in Watts
  • The brightness of a star as seen from the earth means that the brightness of star from 32.6 light-years away ( from earth)

Answer:

A.the amount of energy a star emits in a unit of time

Explanation:

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