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Mrac [35]
3 years ago
14

Explain the origin of the magnitude designation for determining the brightness of stars. Why does it seem to go backward, with s

maller numbers indicating brighter stars?
Physics
1 answer:
Mashcka [7]3 years ago
5 0

Answer:

Hipparchus was an ancient Greek who classified stars based on the brightness in 129 B.C. He grouped the brightest stars and ranked them 1 (first magnitude) and dimmest stars as 6 (sixth magnitude). Thus, the smaller numbers indicated brighter stars. Now, the scale extends in negative axis as well. More the negative number, brighter is the star. For example, Sun has magnitude -26.74.

This the apparent magnitude which means the classification is based on the brightness of the star as it appears from the Earth.

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Explanation:

By a small online search i've found the image related to this question, and you can see it below.

Joules is a unit of energy, such that:

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In other hand, Watt is a unit of power, such that:

1 W = 1 J/s

Then if we measure power, we are measuring watts, which is equivalent to measuring the total amount of energy in joules in a given period of time, and then dividing that by the time. And if we measure energy, we are directly measuring joules.

Then if we measure power or energy, at some point our measures will be in joules (unless we have an specific device to measure power, but these usually exist for electronic systems, not for mechanical/dinamic systems like the ones in the image), this means that all of them will record their measurements in joules, so the correct option is Lily, Astrid, Henry, and Bob

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3 years ago
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Va ser 0.0900 yo creo preo que esta respuesta te ayude
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