Find the speed for a star in which this line appears at wavelength 120.5 nmnm. Express your answer to three significant figures and include the appropriate units.

Q: A star is known to be moving at 7.87km/s toward the earth. If you observe the spectral line to be at…

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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: 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: I EPIC EPIC

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Q: he spectrum of a star is collected and we find the absorption line of Hydrogen-Alpha (the deepest…

A: We know that the Doppler effect, According to the doppler the formula of the doppler shift of the…

Q: Find the speed for a star in which this line appears at wavelength 121.8 nmnm. Express your answer…

A: Given that-- (lemda)star = 121.8 nm (lemda) = 121.6 nm Speed of light (c) = 3 × 108 m/s Question?…

Q: The spectrum of a typical star shows absorption lines at different wavelengths than their laboratory…

A: In the case of separating observed wavelength increases compared to a real wavelength that is also…

Q: A bright blue star is moving away from Earth. Which of the choices best completes the following…

A: A bright blue star is moving away from Earth. Answer option A Absorption ,Red shifted

Q: At rest, hydrogen has a spectral line at 144 nm. If this line is observed at 168 nm for the star…

A: Given that Hydrogen has a spectral line at λ= 144 nm =10-9m This line is observed at λ'= 168 nm=10-9…

Q: What is the temperature of a star emitting light with a peak wavelength of  7,080 angstroms?  T=…

A: Given : λmax = 7080 angstroms = 7080*10-10 m. From Wien's law the temperature of star is  T =…

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: Two stars have the exact same luminosity, but star Y is four times dimmer looking that star X. This…

A: Basic Details Two stars star X and star Y have same luminosity. The brightness of the star is…

Q: n hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm. Find the speed…

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Q: ASK YOUR TEACHER You want a telescope that discern objects that are at least 3.60 × 107 radians…

A: θ = 3.60×10-7 radians

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

A: Temperature of star

Q: You have taken the spectrum of a star with a peak wavelength at 389 nm. You have determined the…

A: Given data :          Peak wavelength, λmax = 389 nm = 389×10-9 m          Radius of the star, R =…

Q: A star is moving toward the Earth at 250 km/s. What can you say about the wavelength of the H-alpha…

A: ANSWER :- C = It would be less than 656.3 nm Explanation :- According to the DOPPLER EFFECT :- "when…

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: What is the color of the stars shown on the diagram that have the lowest surface temperature? O red…

A: Required: Color of the stars,

Q: The observed brightness of a luminous object falls off as the square of its distance from us (the…

A: Given  measure a different apparent brightness. Because the visual brightness of the further one is…

Q: You are trying to take an image of a particular star with apparent magnitude m=10, and need to…

A: Given: m=10 diameter=0.07 t=79 min

Q: 5. The Luyten 762-8 star system contains two stars, one with apparent 12.5 and the other with m =…

A: Given :  mVega =0 , m1 = 12.5 and m2 =12.9 Concept : mVega - m = 2.5 log(L/LVega)

Q: In Exercise 12.4 of your book, University Physics 15th edition (see End of the Chapter 12 section),…

A: Given Radius of neutron star ,R=87.093 km

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: A nearby star has a parallax of 0.317 arcseconds. How long does it take the light from this star to…

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Q: What are the on the axes of a Hertzsprung-Russell diagram? (b) Name one thing you can tell about a…

A: Hertzsprung-Russell Diagram plots the temperature of the start against their luminosity (or) colour…

Q: Temperature (C) What is the color of the stars shown on the diagram that have the highest surface…

A: SOlution: To find the highest temeprature region in the graph

Q: If a star in our own Milky Way galaxy is moving away from us at 4,811 km/s, by what percentage will…

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Q: The center of our Galaxy is about 7500 parsecs from Earth.  What would be the parallax angle of a…

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Q: A star is known to be moving at 8.93km/s toward the earth. If you observe the spectral line to be at…

A: The velocity can be expressed as, v=λobs-λactλactc

Q: Imagine that you are observing the light from a distant star that is located in a galaxy 100 million…

A: Distance from star to earth d=100 million lightyears. Upon receiving light from this star we are…

Q: Let us imagine that the spectrum of a star is collected and we find the absorption line of…

A: Since            ∆λ/λ   = v/c where  c = 3*10-8m/s v    = velocity of star…

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: The spectral type of a star is directly related to its color. Recall that a star emits light as a…

A: Correct answer is TEMPERATURE Or by Weins law we can say that λT=constant So our parameter is depend…

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: Studying the spectrum of a star, we see that the Haline (l= 656.285nm) has been shifted to 656.286…

A: If source is moving away from the observer, the apparent frequency of light will be decreased (the…

Q: Answer the following questions about "Where Are the Stars?r 5. 1. What is a central idea of the…

A: Hey there, since you have posted a question with multiple subparts. We have solved the first three…

Q: Star A has a temperature of 5,000 K and Star B has a temperature of 6,000 K. At what wavelengths (in…

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Q: The luminosity of a star is 6.6 x 1031 W and the peak wavelength in its spectrum is 4.6 x 10-7 m.…

A: Given  L = 6.6*10^(31) W  Wavelength = lambda = 4.6*10^(-7) m  Area = πR² = A  Temperature = T

Q: Two stars – A and B, of luminosities 0.5 and 4.5 times the luminosity of the Sun, respectively – are…

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Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.