Infrared radiation from the center of our galaxy with a wavelength of about 2 μm (2 x 10-6 m) comes mainly from cool stars. Use this wavelength as Amax and find the temperature of the stars.
Q: Why is it not possible to find out what's going on in our nearest star within the span of 24 hours?
A: Einstein's special relativity explains how speed affects mass, time, and space. As per special…
Q: If a star has a radius 2 times larger than the Sun's and a luminosity 1/4th that of the Sun, how…
A: Given that Radius of star, R = 2 luminosity of the star ,
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: Which spectral line does this likely correspond to?
A: we can use the doppler shift formula to find laboratory wavelength.
Q: What is the surface temperature of a star that emits at a peak wavelength of 400 non? 1nm=1x10(-9) m
A: The peak wavelength λmax=400nm = 400×10-9m
Q: What is the densest substance in the universe?
A: Osmium is the densest thing in the universe.
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Q: Which of these is NOT a possible description for Doppler Shift? Shortened wavelength Elongated…
A: Doppler Shift: The Austrian physicist Christian Doppler proposed the Doppler shift in 1842. The…
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Q: Star A has a temperature of 3000K; Star B has a temperature of 5000K; Star C has a temperature of…
A: Given value--- temperature of star A = 3000 K. temperature of star B = 5000 K. Temperature of…
Q: Star B has a temperature that is 5 times higher than Star A. How much more energy per second…
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Q: Consider stars whose properties are described below: 14.7 Star V. В - V My Tetr (K) Spectral Class…
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Q: What is the wavelength of maximum intensity (in nm) and the total energy emitted (in J/s/m2) by a…
A: By the Wien's law the relation between Temperature (T) and wavelength is given by,
Q: Calculate the total amount of radiative energy per second intercepted by Mars from the Sun using the…
A: Given data: Flux of radiation, Φ=597 W/m2 Luminosity of Sun, Ls=3.8×1026W Distance, D=2.25×1011m
Q: at what wavelength (in nm) will it radiate the most energy? Is this a cool or hot star?
A: According to Wien's displacement law The peak wavelength relation is given as Peak wavelength =…
Q: Jupiter radiates more energy than it receives from the Sun by 8.7 ×10–10 LO. Jupiter's radius is 7.1…
A: Conservation the principle that in a system that is not subject to external influence, the total…
Q: Suppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0×10-12 watt/m?.…
A: Luminosity of star (L) = 7×1026 watt Apparent brightness (AB) = 4×10-12 Wm2
Q: Using the proportionality relationships for stellar luminosity as a function of mass and stellar…
A: Stellar lifetime is directly proportional to Stellar mass. Stellar luminosity is inversely…
Q: At what wavelengths do stars of surface temperates 20 000 K, 10 000 K, and 3000 K have their peak…
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Q: If two stars, star A and star B, have equal radii, but star A is ten times more luminous than star…
A: The luminosity of a star is related to the the surface area and temperature as follows L α AT4 Let…
Q: If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength…
A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…
Q: Using Wien's law, what is the wavelength (in nanometers) of the peak of the spectrum of a star which…
A: Solution:-Given thatSurface Temperature (Ts)=2.9×104 K
Q: Consider a star for which the stellar power per unit area at distance 1 AU from the star is 3.7…
A: Write the expression for the radiated power at the surface of the star. P=σAT4P=σ(4πR2)T4 Here, σis…
Q: Imagine that you are observing a star and you find the wavelength of peak emission for the star to…
A: required:)wavelength of peak emission for a new star having temperature one third of original star.
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: Tutorial Star A has a temperature of 6,000 K. How much energy per second (in J/s/m²) does it radiate…
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Q: What is the wavelength of maximum intensity (in nm) and the total energy emitted (in J/s/m2) by a…
A: The temperature of the celestial body is given to be 7K. In case of a celestial body which we…
Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…
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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: Given that the solar spectrum corresponds to a temperature of 5800 K and peaks at a wavelength of…
A: Given: The temperature of solar spectrum is 5800 K. The solar spectrum peaks at…
Q: (a) The surface temperature of a star is 25,000 K and it has a luminosity about 1% that of our Sun.…
A: Luminosity: It is the total amount of electromagnetic energy emitted per unit of time by an object.…
Q: Plot the spectral emittance the five bodies in our solar system Listed here: Sun (6000 K) Venus (600…
A: The spectral emittance of a body is given by : Bλ(λ,T)=2hc2λ51ehc/λkT−1Here, h is the planck's…
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- As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5 times as much flux hitting an observer's detector/telescope/eye (i.e. a star with an apparent magnitude of 4 has approximately 2.5 times more flux hitting the detector as a star with an apparent magnitude of 5). With this in mind what is the approximate ratio of the flux hitting the a detector for a star with an apparent magnitude of 3 compared to a star with an apparent magnitude of 7? (hint: remember that magnitudes follow a logarithmic scale, not a linear one)In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm . If the line appears in a star’s spectrum at 485.8 nm , what is the star’s radial velocity? Is it approaching or receding? Is this a blueshift or a redshift?The above spectrum is most plausibly produced by which kind of object? Select one alternative: A planet A planetary nebula A galaxy A star A supernova
- Calculate the size of a star if its surface temperature is 6000 K and has a power output of 5.6 x 1026 W.You record the spectrum of a distant star using a telescope on the ground on Earth. Upon analysing the spectrum, you discover absorption lines spaced at intervals typical of oxygen atoms. Which of the following are possible interpretations of this evidence? Select all that apply. The width of the spectral lines gives the diameter of the star The star is likely orbited by habitable planets with breathable atmospheres. The height of the spectral lines above the star's general blackbody spectral curve tells us how much oxygen is in the star The atmosphere of Earth contains oxygen The red or blueshift of the set of lines can tell us the speed of the star's motion toward or away from usWhat is the wavelength of maximum intensity (in nm) and the total energy emitted (in J/s/m2) by a celestial object at 6 K above absolute zero?
- If a star has a radial velocity of 25 km/sec and a transverse velocity of 60 km/sec what is the stars space velocity?For a star with surface temperature 5,100 K, what is the peak frequency of light from the sun? Write your answer in THz (1012 Hz), to zero decimal places. Take the speed of light to be c=3 x 108 m/s.If a star has a surface temperature of 20,000 K (2.00 × 104 K), at what wavelength will it radiate the most energy?
- A scientist, using a telescope, sees arcs of light around a galaxy. In 3–5 sentences, explain the cause of the arcs of light.Using Wien's Law for two black body objects with a temperature of 1000 K (fire) and 290 K (background), at what central wavelengths are the two objects radiating?At the low temperature found in some interstellar molecular clouds (around 100 K), molecular oxygen emission is strongest at a wavelength of 0.2521 cm. Determine the speed (in km/s) of a low temperature molecular cloud containing molecular oxygen if its strongest emission is at a wavelength of 0.1885 cm. Note that this cloud is moving towards us, so the answer should be negative.