An object’s apparent magnitude depends on
its intrinsic luminosity, its distance from Earth, and any extinction of the object’s light caused by interstellar dust along the line of sight to the observer
.
Which two factors influence the magnitude of a star?
Absolute magnitude
Why? The apparent brightness of a star depends on two factors:
the intrinsic brightness of the star, and the distance to the star
.
What factors does the apparent magnitude depend on?
The apparent brightness, or apparent magnitude, depends on
the location of the observer
. Different observers will come up with a different measurement, depending on their locations and distance from the star.
What 2 factors determine the luminosity of a star?
If they know the star’s brightness and the distance to the star, they can calculate the star’s luminosity: [
luminosity = brightness x 12.57 x (distance)
2
]
. Luminosity is also related to a star’s size. The larger a star is, the more energy it puts out and the more luminous it is.
What are the two 2 factors that affects the brightness of a star?
The apparent brightness of a star depends on
both its luminosity and its distance from Earth
. Thus, the determination of apparent brightness and measurement of the distance to a star provide enough information to calculate its luminosity.
What are the 4 factors that affect the apparent brightness of a star?
The intrinsic properties of stars include brightness, color, temperature, mass, and size. Three factors control the brightness of a star as seen from Earth:
how big it is, how hot it is, and how far away it is
.
What color star is the coolest?
Red stars
are the coolest. Yellow stars are hotter than red stars. White stars are hotter than red and yellow. Blue stars are the hottest stars of all.
What is magnitude formula?
The magnitude of a vector is the length of the vector. The magnitude of the vector a is denoted as ∥a∥. … For a two-dimensional vector a=(a1,a2), the formula for its magnitude is
∥a∥=√a21+a22.
What is the difference between magnitude and distance?
Distance is defined to be the
magnitude or size of displacement between two positions
. Note that the distance between two positions is not the same as the distance traveled between them. Distance traveled is the total length of the path traveled between two positions. Distance traveled is not a vector.
What is the relationship between brightness and apparent magnitude?
The apparent magnitude of a celestial object, such as a star or galaxy, is the
brightness measured by an observer at a specific distance from the object
. The smaller the distance between the observer and object, the greater the apparent brightness. (left) Two stars, A and B, with the same apparent magnitude.
What is magnitude example?
Magnitude is defined as large in size or very important. An example of magnitude is
the depth of the Grand Canyon
. An example of magnitude is the size of the problem of world hunger. (geology) A measure of the amount of energy released by an earthquake, as indicated on the Richter scale.
How do you find apparent magnitude and distance?
If you know a star’s absolute magnitude, then when you compare it to calibration stars, you can determine its distance. Its distance = 10
( apparent magnitude – absolute magnitude + 5 )/ 5
.
What is star life cycle?
A star’s life cycle is
determined by its mass
. The larger its mass, the shorter its life cycle. A star’s mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born.
Which star is the hottest?
The hottest one measures ~210,000 K; the hottest known star.
The Wolf-Rayet star WR 102
is the hottest star known, at 210,000 K.
What is the difference between brightness and luminosity?
Luminosity is the rate at which a star radiates energy into space.
Apparent brightness
is the rate at which a star’s radiated energy reaches an observer on Earth. Apparent brightness depends on both luminosity and distance.
