A He-Ne laser with wavelength 632.8 nm is fired from a great distance toward a neutron star with mass 4.5 x 1030 kg and radius 12 km. What is the wavelength of light received at the neutron star’s surface?

Q: Problem 3: Two stars, M and N, from the same galaxy (at the same distance from earth) are observed…

A: The both stars emit same amount of energy per unit time.  Luminosity is given as  L=4πR2σT4, where R…

Q: What is the rate of thermal radiation emitted from a star with a radius of 2.310 x 109 m and a…

A:

Q: A He-Ne laser with wavelength 632.8 nm is fired from a great distance toward a neutron star with…

A: As per the general theory of relativity, gravity affects light and causes energy change in photons.…

Q: What wavelength (in nanometers) is the peak intensity of the light coming from a star whose surface…

A: Determine the wavelength of the light.

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: What is the wavelength of peak emission for a black body at 37°C? (c = 3.0 × 108 m/s, Wien…

A: T = 37 C= ( 37 + 273.15 ) K = 310.15 K I just changed degree celsius into Kelvin  From Wien's…

Q: The surface temperature of a star is measured to be 6000 Kelvin. According to Wien's Displacement…

A: Surface temperature (T) of the star = 6000 Kelvin

Q: What is the rate of thermal radiation emitted from a star with a radius of 4.11 x 109 m and a…

A: A blackbody is considered as an ideal physical body which will absorb and emit all the radiations…

Q: The star Betelgeuse has surface temperature 3590 K and can be regarded as a blackbody. (a) Find the…

A: The temperature of the Betelguese is given as T=3590 K (a). According to Weins displacement law, the…

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: If it takes 10.2 eV of energy excite hydrogen from the ground state into the first excited (n = 2)…

A:

Q: The figure above shows the light-curve obtained from continuous monitoring of the flux received from…

A: Given Star mass Mstar           = 1.47 M⊙ Star radius Rstar          = 1.84 R⊙ Mass of sun M⊙…

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: What would the wavelength of the 21 cm line be for a source moving away from the Earth at 10% the…

A: As per the Doppler effect, the observed wavelength can be found as, Here, λO, λS, v, and c…

Q: The mass of a star is 1.99·1031 kg and its angular velocity is 1.60E-7 rad/s. Find its new angular…

A: Given data: The mass of the star is m=1.99x1031 kg. The initial angular velocity of the star is…

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: The elliptical galaxy NGC 4889 is the largest galaxy in the Coma Cluster (shown in the image below…

A: Given: The Measured wavelength: λm=401.8 nm The rest wavelength: λr=393.3 nm

Q: What is the wavelength in micrometers  of peak emission for a black body at 33.5°C? (c = 3.0 × 108…

A: Given values:Temperature of the black body:T = 33.5°C = 306.65 K Wein's displacement law:We know…

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

A:

Q: The temperature of a star is 4990 K. Calculate the power per unit area radiated by the star in 519…

A: The temperature of the star,

Q: When stars like the Sun die, they lose their outer layers and expose their very hot cores. These…

A: Wien's displacement law states that the BLACK BODY RADIATION  curve for different temperatures will…

Q: Neutral hydrogens are detected with their emission lines of 21cm. What is the energy of a photon in…

A: Given, The wavelength of the emission line λ=21 cm = 0.21 m The speed of light, c=3×108 m/s Take,…

Q: bol = 7.77. What is th

A: Given: To find the Proxima Centauri absolute magnitude is given as,

Q: GC 4889 is the largest galaxy in the Coma Cluster (shown in the image below taken by the Hubble…

A: We know that the  recessional velocity of the galaxies in terms of the speed of length and…

Q: A spectrograph is used to measure radial velocities. The spectral dispersion is 0.1 Å/pixel. The…

A: Spectrograph is an instrument which differentiate the light incident by wavelength or frequency and…

Q: What is the rate of thermal radiation Emitted from a star with a radius of 2.310 x 10⁹m and a…

A:

Q: What is the significance of the color of a star? O The color tells how far away the star is O The…

A: Color of star:-

Q: A hydrogen atom undergoes a transition from an excited state to the ground state by emitting a…

A: Energy difference between excited state and ground state ∆E=2.04 eV Wavelength of emitted photon λ=…

Q: Imagine a planet orbiting a star. Observations show a Doppler shift in the star's spectrum of 58 m/s…

A:

Q: Imagine a planet orbiting a star. Observations show a Doppler shift in the star's spectrum of 66 m/s…

A: Given data: Star's velocity v = 66 m/s Time t = 4.5 days Sun's mass M=2.0×1030 kg Unit 1…

Q: Imagine a planet orbiting a star. Observations show a Doppler shift in the star's spectrum of 58 m/s…

A:

Q: Gauss's law states that f 9.dA= −47GM. A spherical star of mass M and radius R has a uniform…

A: Total mass=MRadius =R

Q: Two stars in a binary system, are seen edge-on from Earth. The HB line emitted by Star 1 varies…

A: Solution: The velocity can be obtained from the doppler redshift formula, v=c∆λλ…