Which of the following stars has the highest surface temperature? Treat the star as a blackbody. a)A dim red star  b)A bright red star c)A bright orange star  d)A dim orange star  e)A bright yellow star

Q: Hertzsprung-Russell Diagram Blue or blue White Vellow Red-orange Red Rigel Beteignuse Aldebaran…

A: As it can be seen from Hertzsprung-Russell diagram that the y axis represents brightness which…

Q: The surface of a star usually has the highest temperature O True O False

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Q: What is therate of thermal radiation emittedfrom a star witha radius of 2.310x 109mand a surface…

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Q: Our sun is a standard sequence yellow dwarf star with a temperature of about 6000 K and a radius of…

A: The solution is given by

Q: Two stars of the same diameter or observed to have surface temperatures of 4000 Kelvin and 16,000…

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Q: 656 nm emitted by electrons dropping from the n = 3 to the n = 2 orbital in hydrogen. The hydrogen…

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Q: Estimate the surface temperature of a star that emits an intense light of frequency 4.8 ×104 Hz. (а)…

A: Given:Frequency of light, f=4.8×1014 Hz To estimates the surface temperature of star.

Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…

A: Given , Temperature = 3000 K Solar Luminosity = 100,000  Now , mass and luminosity are related by…

Q: A star such as our Sun will eventually evolve to a “red giant” star and then to a “white dwarf”…

A: Given that, The surface temperature of the white dwarf, Tw=2.5×103 K The surface temperature of the…

Q: Hertzsprung-Russell Diagram Bhe or bhue white White Vellow Red orange Red ORigel Superglants…

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Q: The surface temperature of a star is about 10,000 K.  Use this to calculate the total energy…

A: Given data The surface temperature of a star is Ts = 10000 K The radius of the star is Rstar = 2.5 x…

Q: Why don’t we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K?   a.…

A: Hydrogen atoms are completely ionized in the atmosphere of the hottest starts.because the proton and…

Q: Select all the statements below regarding spectral lines that are true. | The stars with the most…

A: Spectral lines are produced by the transitions of electrons within atoms or ions. As the electrons…

Q: Imagine a planet orbiting a star. Observations show a Doppler shift in the star's spectrum of 52 m/s…

A: Given that:

Q: Suppose a star has luminosity 100 times greater than than Sun and a radius 4 times greater than the…

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Q: Choose the correct statements concerning the electromagnetic spectrum given off by stars. (Give ALL…

A: Most electrons emit their electromagnetic energy in the form of light. Hotter stars emit higher…

Q: Assuming stars to behave as black bodies stefan-boltzmann law to show that the luminosity of a star…

A: Flux is the amount of light that comes from a certain area (usually one square meter) in a certain…

Q: What characterizes a star of spectral-type A in the visible part of the spectrum? Strong lines…

A: Spectral type A has wavelength ranging from 290-390 nm. They have very strong hydrogen lines.

Q: Problem 7. Assume that a star can be approximated as a black body, using Stefan's Boltzmann Law 1.…

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Q: Which star is brighter as seen from the Earth? (you only have one try for this problem) A) A star…

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Q: Why don’t we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K?

A: Balmer series is a spectral emission line of the hydrogen that result electron transition from…

Q: You can estimate a star’s radius R(meters) by its luminosity L(Watts) and its surface temperature…

A: Luminosity of star can be expressed by he following formula; L=4πR2σT4 Stephen-Boltzmann constant…

Q: Calculate the surface temperature of the star Betelgeuse whose λmax is 850 nm

A: Wien's Law of Blackbody Radiation λmaxT = a constant = 3 × 106 where λmax = wavelength of radiation…

Q: Describe the principle of hydrostatic equilibrium as it relates to the internal structure of a star…

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Q: A group of four stars, all the same size, have the four different surface temperatures given below.…

A: Temperature of star

Q: The present-day density of the sun is about 1.4 g/cm3. The volume of a sphere is 4/3πr3. The density…

A: Given:ρsun=1.4g/cm3ρstar=ρsunxRsunRstar3volume of sphere =4/3πr3to find:ρsun when Rsun=50 times…

Q: What measurements would you make (assuming you have the money, time, & equipment) to determine a…

A: In this question we have to answer what measurements we will make to determine the surface…

Q: The surface temperature of a class O blue-white star is around 40 *10^3 K. At what frequency will it…

A: Given data: Surface temperature of class O blue-white star is, T=40×103 K.

Q: From its spectral type, the surface temperature of a main sequence star is measured to be about…

A: Using the 1r2 rule method, we can find out the star's distance by measuring the intrinsic brightness…

Q: Hertzsprung-Russell Diagram Blue or blue-white White Yellow Red-orange Red O Rigel Supergiants…

A: Option a is the right answer  Red color of the stars have lowest surface temperature

Q: spectrum of this star, the H alpha line is observed to have a wavelength of 656.034 nm when measured…

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Q: If a T Tauri star is the same temperature as the Sun but is seventeen times more luminous, what is…

A: Given that  The temperature of the Tauri Star(Tt) is the same of the sun( Tsun).…

Q: A main sequence star of mass, M, and radius, R, collapses to a white dwarf star with a radius 1.0%…

A: To solve the given question, we will use conservation of angular momentum.

Q: A bright red star is moving towards Earth. Which of the choices best completes the following…

A: Answer : - option D is correct. Explanation It is absorption because it is continuous spectrum,…

Q: If you find that the hydrogen alpha line in a star's spectrum occurs at a wavelength of 656.45 nm,…

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Q: Our sun is a standard sequence yellow dwarf star with a temperature of about 6000 K and a radius of…

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Q: Arrange the following stars in order of increasing temperature: Red, white, blue, yellow red100…

A: Stars in increasing temperature order :   1. Blue 2. White 3. Yellow 4. Red

Q: If a T Tauri star is the same temperature as the Sun but is eighteen times more luminous, what is…

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Q: at is the wavelength corressponding to the most intense light emitted by a giant star od surface…

A: Given values:- Temperature,(T)=5000 K ----(1) Constant of proportionality,(b)=2.90 x 10-3 m-K…

Q: The brightness of a "young" star sometimes increases and decreases as a result of regional areas of…

A: Let the average magnitude of brightness be denoted as Mavg. Mavg=4.3Variation from mean value: ±0.31…

Q: A star has a peak output at 440 nm and has a luminosity of 3 solar luminosities.  What is its…

A: Given data The peak wavelength is given as  λ=440 nm. The number of luminosities is given as n = 3.…

Q: If a star has a surface temperature of 25,000 K (2.50 ✕ 104 K), at what wavelength (in nm) will it…

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Q: As shown two stars in the constellation Orion. Betelgeuse appears to glow red, whereas Rigel looks…

A: Betelgeuse appears to glow red whereas Rigel looks blue in color.

Q: The maximum wavelength of the energy emitted by the sun if the luminosity of the sun decreases by…

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Q: What is the average radiated power per unit area by each of these types of stars? b) What is the…

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Q: Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons…

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Q: star that is moving toward Earth will   a. have its spectral lines shifted to the red.   b. have…

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Q: What is the average radiated power per unit area of the red giant

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