<em>The apparent magnitude of the star is the measure of the brightness of the star that is observed from the Earth whereas the absolute magnitude is the brightness observed from a distance of </em><em> light years.</em>
Explanation:
The magnitude of a star is defined as the amount of brightness delivered by the star. The amount of light or the brightness of the star that reaches the Earth is called as the apparent magnitude of the star.
The actual magnitude of the brightness of the star never reaches the Earth because there is a huge amount of loss in the brightness due to the density of the space and other matter present in the space.
The absolute magnitude of the star is termed as the brightness of the star as observed from the distance of about . The light should reach at that distance and it's brightness should not reduce to zero after travelling this distance.
So, the amount of brightness observed at a point at a distance of or from the star is termed as absolute magnitude.
Thus, <em>The apparent magnitude of the star is the measure of the brightness of the star that is observed from the Earth whereas the absolute magnitude is the brightness observed from a distance of </em><em> light years.</em>
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Answer details:
Grade: High School
Subject: Physics
Chapter: Stars
Keywords:
star, magnitude, absolute, apparent, observed, Earth, brightness, loss, light, space, energy, 10 parsec, 32.6 light years.