Why does hydrogen, which is abundant in the sun's atmosphere, have relatively weak spectral lines, while calcium, which is not abundant, has very strong spectral lines?
Q: Suppose a certain star has a temperature of 10,000 Kelvins (K). It will emit light of many different…
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Q: A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R…
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Q: Why is the sun orange?
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Q: If one star has a temperature of 5,000 K and another star has a temperature of 8,500 , how much more…
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Q: Two stars of the same diameter or observed to have surface temperatures of 4000 Kelvin and 16,000…
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Q: What property of a star had a greater effect on the amount of light emitted—its temperature or its…
A: A very small increase in the temperature of star can significantly increase the energy emitted per…
Q: Why is being able to determine a distance form just an angular measurement important? Also why is…
A: As we know, The angular measurements are the divided circle by the scale of a vernier protractor. It…
Q: Earth tugs the sun around as it orbits, but it affects the radial velocity of the sun by only 0.09…
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Q: Imagine that you are observing a star and you find the wavelength of peak emission for the star to…
A: In this question we have to find the wavelength of peak emission. Please give positive feedback if…
Q: Why does the spectrum of most stars (including the Sun) show absorption lines in which light is…
A: Solution: Given: Why does the spectrum of most stars (including the Sun) show absorption lines in…
Q: What is the approximate temperature of the sun at its chromosphere ?
A: The chromosphere is the third layer of Sun. It ranges from 400 km to 2100 km above the solar…
Q: In the Sub giant phase which of the following is true? O The star is burning He in the core O The…
A: Given : In the Sub giant phase The star is burning He in the core The star is burning He in a shell…
Q: From the HR diagram above, we could determine that the star Barnard's Star has a temperature 3.03E+3…
A: Solution: The luminosity of state is given by the following formula, L=4πR2σT4…
Q: If each square cm of the sun's surface radiates energy at the rate of 1.5x 10° cal/s/cm? and…
A: A blackbody is an object that is capable of absorbing all the radiation that falls on it and…
Q: If the atmosphere were twice as thick as it currently is (extending farther into space), what effect…
A: If the atmosphere were twice as thick as it currently is ( extending farther into space ) , the sky…
Q: A star with a mass like the Sun which will soon die is observed to be surrounded by a large amount…
A: Infrared bands are used in identifying dim, cool stars because they can slice through the stellar…
Q: Besides using the peak wavelength emitted in its blackbody curve, how can a star’s spectrum tell you…
A: Introduction: A blackbody is a theoretical or model body that absorbs all radiation falling on it,…
Q: What is the Sun's energy output (luminosity)? Group of answer choices About 4 x 1026 Watts About a…
A: We know that, Sun has radius of 695 x 106 m giving a surface area of 6.09 x 1018 m2 .
Q: if gas cloud in the image crosses in front of the star, and the gas cloud and star have different…
A: A gas cloud has a lot of hydrogen in it, which abosrbs the UV light emitted by a star. When UV light…
Q: Star A has a temperature of 5,000 K. How much energy per second (in J/s/m2) does it radiate from a…
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Q: At what wavelength does the human body emit most of its light? (Assume body temperature is 98.6…
A: λ=b/T b=2.89*10-3 m-K T(in kelvin)=(32°F − 32) × 5/9 + 273.15 = 310.15 K λ=0.00289/310.15 =…
Q: The figure below shows the spectra of two stars on the same scale (Star A = red line; Star B = green…
A: According to Hubble's law, velocity of recession of star from our earth is directly proportional to…
Q: Why do two different gasses always have different spectral signatures?
A: Given Why do two different gasses always have different spectral signatures, as following below.
Q: Star A has a temperature of 5,000 K and Star B has temperature of 6,000 K. At what wavelengths (in…
A: Temperature of star A = 5000 k temperature of star B = 6000 k
Q: The above spectrum is most plausibly produced by which kind of object? Select one alternative:
A: Required : Correct choice.
Q: If a star has a surface temperature of 20,000 K (2.00 × 104 K), at what wavelength will it radiate…
A: For calculating the wavelength emitted by a hot body consider it as a blackbody. A blackbody is an…
Q: Two stars have the same diameter and are at the same distance from us (but in different parts of the…
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Q: The white dwarf star Sirius B has a luminosity of 0.025 L⊙. If you were 1 AU from Sirius B, would…
A: Given,Temperature, Apparent magnitude of the sun, The luminosity of the star sirius B, The…
Q: Why do stars tend to form in groups?
A: Space is filled with an interstellar medium that consists of gas and dust particles. The density…
Q: 1. Spectral signatures can be described using luminosity values in different spectral regions. UV…
A: Yes, it is possible to separate the different categories based on the values in given table because…
Q: Which of the following statements are TRUE about the Sun's spectrum, which is shown in th image?
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- Barnard's Star is the 2nd closest star to Sol (~ 6 light years). It is moving toward the Earth with a speed of 110 km/s. Calculate the blue shift of light from Barnard's star, defined by AX/X. OA: OB: OC: OD: OE: -3.668x10-4 -4.586x10-4 -5.732x10-4 -7.165x10-4 OF: OG: -8.956x10-4 -1.120x10-3 -1.399x10-3 OH: -1.749x10-3A certain star has a temperature twice that of the Sun and a luminosity 64 times greater than the solar value. What is its radius, in solar units?What is the ultraviolet catastrophe?
- When astronomers look at the spectrum of the Sun, they noticed that the light from one edge is slightly blue-shifted, while light from the opposite age is slightly red-shifted. What does this tell you about the Sun?Earth tugs the Sun around as it orbits, but it affects the radial velocity of the sun by only 0.09m/s. How large a shift in wavelength does this cause in the Sun's spectrum at 575 nm?If you observe a star’s blackbody spectrum twice, once from Earth and once from a space shuttle above Earth’s atmosphere, what will you see? An absorption spectrum from Earth and a continuous spectrum from space An absorption spectrum from space and a continuous spectrum from Earth An absorption spectrum from space and an absorption spectrum with more absorption lines from Earth An absorption spectrum from Earth and an absorption spectrum with more absorption lines from space