Earth Sciences. Earth Sciences questions and answers. Question 20 (2 points) If star A is 14.5 times brighter than star B, then what is their magnitude difference? O A) 1.2 OB) 2.9 C153.1 OD) 800 E) 6.2 x 103.
If star A is 14.5 times brighter than star B, then what is their magnitude difference? asked Jun 7, 2017 in Physics & Space Science by Beth401. a. 1.2 b. 2.9 c. 63.1 d. 800 e. 6.2 x 10^5. introductory-astronomy; 0 Answers. 0 votes. answered Jun 7, …
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First confusing point: Smaller magnitudes are brighter! The magnitude scale was originally defined by eye, but the eye is a notoriously non-linear detector, especially at low light levels. So a star that is two magnitudes fainter than another is not twice as faint, but actually about 6 times fainter (6.31 to be exact).
Star B is brighter than star A because it has a lower apparent magnitude. Star B is brighter by 5.4 - 2.4 = 3 magnitudes. In terms of intensity star B is 2.512(5.4-2.4) = 2.5123.0 = approximately 15.8 times brighter than star A.Mar 2, 1999
A fourth magnitude star is 2.512 times as bright as a fifth magnitude star, and a second magnitude star is (2.512)4 = 39.82 times brighter than a sixth magnitude star....Comparing the magnitudes of different objects.Apparent magnitude difference (m2 - m1)Ratio of apparent brightness (b1/b2)12.5122(2.512)2 = 6.313(2.512)3 = 15.854(2.512)4 = 39.823 more rows
To find how the apparent brightness of two stars compare to each other, you can simply find the difference in magnitudes, and raise the number 2.512 to that power, like so: 9 – 2 = 7 and , and the 2nd magnitude star is 631 times brighter than the 9th magnitude star.
0:384:42Ex: Determine the Difference in Order of Magnitude of Two Quantities ...YouTubeStart of suggested clipEnd of suggested clipThe difference in order of magnitude is equal to the common log of a divided by B to understand theMoreThe difference in order of magnitude is equal to the common log of a divided by B to understand the meaning of this if one quantity is 10 times or 10 - the first time is larger than another quantity.
So a 1st magnitude star is 2.512 times brighter than a 2nd magnitude star, and 2.5122=6.31 times brighter than a 3rd magnitude star, and 2.5123=15.9 times brighter than a 4th magnitude star, 2.5124=39.8 times brighter than a 5th magnitude star, and 2.5125=100 times brighter than a 6th magnitude star.
A difference of 5 magnitudes corresponds to a brightness factor of a hundredfold. In other words, a 1st-magnitude star is 100 times brighter than a 6th-magnitude star – or conversely, a 6th-magnitude star is 100 times dimmer than a 1st-magnitude star.Mar 22, 2017
The apparent magnitude of a star therefore depends partly on its distance from us. In fact Sirius appears brighter than Betelgeuse precisely because Sirius is very close to us, only 2.6 pc away whereas Betelgeuse is about 160 pc distant.
Sirius has a luminosity 25.4 times greater than the sun, but, because it is 8.6 light years away, its apparent brightness is 12 billion times less than that of the sun. For the sun to appear as dim as Sirius, it would need to be moved 1.7 light years away.Mar 17, 2021
Betelgeuse is one of the largest known stars and is probably at least the size of the orbits of Mars or Jupiter around the sun. That's a diameter about 700 times the size of the Sun or 600 million miles....Betelgeuse.Fact TableNameBetelgeuseBrightness7,500 times greater than the SunSurface Temperature6000 FColorOrange-red4 more rows
We measure the brightness of these stars using the magnitude scale. The magnitude scale seems a little backwards. The lower the number, the brighter the object is; and the higher the number, the dimmer it is. This scale is logarithmic and set so that every 5 steps up equals a 100 times decrease in brightness.
Absolute Magnitude Mv = m - 2.5 log[ (d/10)2 ]. Stars farther than 10 pc have Mv more negative than m, that is why there is a minus sign in the formula. If you use this formula, make sure you put the star's distance d in parsecs (1 pc = 3.26 ly = 206265 AU).Apr 10, 1998
If two numbers differ by one order of magnitude, one is about ten times larger than the other. If they differ by two orders of magnitude, they differ by a factor of about 100. Two numbers of the same order of magnitude have roughly the same scale: the larger value is less than ten times the smaller value.
How do we define the apparent brightness of stars in the night sky? The Greek astronomer Hipparchus cataloged the stars in the night sky, defining their brightness in terms of magnitudes (m), where the brightest stars were first magnitude (m=1) and the faintest stars visible to the naked eye were sixth magnitude (m=6).
So a star that is two magnitudes fainter than another is not twice as faint, but actually about 6 times fainter (6.31 to be exact).