What is luminosity? the amount of energy a star emits in a unit of time the brightness of a star as seen from earth the average temperature of a star during its life cycle the degree of shift toward the red end of the spectrum
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Ответ:
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object. So the answer is A.
Ответ:
The amount of energy a star emits in a unit of time
Explanation:
Luminosity of a star is defined as the amount of energy emitted by it per unit time. It is measured in Watts.
The Luminosity of sun is about 3.8 × 10²⁶ W.
Apparent brightness can be measured using the Luminosity. Apparent brightness is the ratio of luminosity per square meter measured at certain distance from a star.
Ответ:
2
4
50%
Explanation:
:)