Should it be possible in principle for a photon to circle a very massive star?

Q: A spectrograph can be used to: O determine the chemical compositions of stars O break light from an…

A: Spectrograph can be used to break line from an object into colours

Q: Do gaps emerge between photons when a star's light stretches out and weakens?

A: Do gaps emerge between photons when a star's light stretches out and weakens?

Q: A star has the same size as the sun but with a mass five times as great. It rotates one revolution…

A: Law of the conservation of the angular momentum: In the absence of the external torque, the net…

Q: Calculate the temperature of a blackbody that peaks at a frequency of 7.5·108 MHz.

A: Given                     Fmax = 7.5 x 108 MHz                              = 7.5 x 108 x 106 Hz

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: the energy of the most energetically possible photon emitted is

A:

Q: Infrared observations of a star show that the star is most intense at a wavelength of 280 nm. What…

A: Write the expression for Wien’s law. λmaxT=2.898×10-3 m·KT=2.898×10-3 m·Kλmax

Q: Consider a 4.6-cm microwave photon. What is the momentum of the photon in kilogram meters per…

A: Momentum of Photon P= 1.44 × 10-32 Kg.m/s   We know momentum of photon is given by  Momentum  of…

Q: You observe an object’s spectrum and you find that it has a flat spectrum in lambda: its flux…

A: The formula for the frequency of a visible (electromagnetic) spectrum is:

Q: Using conservation principles, prove that a photon cannot transfer all its energy to a free…

A: To solve this case, conservation of energy and momentum is to be examined. Let , 'lambda' be the…

Q: If the breadth of a spectral line of wavelength with 4000 A is 10-4 A what is the time for which the…

A: According to Heisenberg Uncertainty Principle,  ΔE. Δt = h/4π

Q: Astronomers determine the surface temperature of a star by measuring its brightness at different…

A: By measuring the brightness at different frequencies, the spectral radiance can be found. And the…

Q: Give the basic principle of conversion of light into an electrical pulses in a scientilation…

A: In this problem, it is asking about the basic principle of conversion of light in to an electrical…

Q: The highest-velocity stars an astronomer might observe have velocities of about 400 km/s. What…

A: The radial velocity formulae is

Q: Calculate the energy in corresponding to light of wavelength 45nm.

A: Given : λ= 45 nm = 45 x 10-9 m We need to calculate the energy for the given wavelength E = hcλ…

Q: Most radiation detectors are gas-filled and solid-state detectors, but liquid scintillation…

A: Gas filled detectors are one of the most commonly used radiation detectors. They work on the general…

Q: A blackbody radiatior in the shape of a sphere has a surface area of 15 m^2. If it has a temperature…

A: Given data as per question  Surface area of radiator = 15 m2 Temperature =1200 K

Q: Calculate the energy, in joules, for a photon of 1024nm light.

A:

Q: If we double the frequency of light, we double the energy of each of its photons. If we instead…

A:

Q: A star whose temperature is 8000 K has a peak wavelength of 362.5 nm, according to Wien's Law. If…

A: temperature of the star = 8000 K peak wavelength (λo) = 362.5 nm velocity of star (v) = 402000 kmhr…

Q: under what circumstances would sound have doppler redshift

A: Red shift : The shift of wavelength toward red. This means increase in wavelength. Red has longest…

Q: According to Wien's Displacement Law, the wavelength of maximum emission of a body with a…

A: Given  Temperature T=357K

Q: What is the smallest wavelength, in nvm, of light that we can normally see?

A: The human eye can only see visible light. The visible light spectrum is the segment of the…

Q: A star has the peak of its blackbody spectrum occur at a wavelength of 284 nm. What is its…

A:

Q: Why won’t a very bright beam of red light impart more energy to an ejected electron than a feeble…

A: Violet has more frequency than red .Energy of electromagnetic radiation is directly proportional to…

Q: The spectral emittance curve for the star Rigel A is a good approximation of the curve for a…

A: To determine: The surface temperature of rigel A and the power that Rigel A will radiate per unit…

Q: What would be the wavelength of a 50 gram golf ball traveling at 40 meters/second? Is this large…

A: It is given that,

Q: The inability of classical theory to explain the frequency distribution of a blackbody was called…

A: Ultraviolet Catastrophe (or Rayleigh-Jeans catastrophe) predicts an ideal blackbody at thermal…

Q: iA photon has a wavelength of 619 nm. Calculate the energy of the photon in joules.  iiProtons can…

A: i) Given data The wavelength of the photon is given as λ=619 nm. The energy of the photon is…

Q: Using Wien's Law for two black body objects with a temperature of 1000 K (fire) and 290 K…

A:

Q: Can you now explain why blue stars hotter than the red stars?

A: 5) "Wien's displacement law states that the peak wavelength of the spectrum of light radiated by a…

Q: Calculate λmax for blackbody radiation for (a) liquid helium (4.2 K), (b) room temperature (293 K),…

A:

Q: Calculate the wavelength of the photon emitted when a particle of mass 1.0 x 10-27 g, in a…

A: The energy of a particle of mass m in a one dimensional box of length L is given by the formula…

Q: Assuming that a person can just notice a difference between a light with a brightness of 11 lumens…

A:

Q: Consider a photon with energy 1.5 eV. 1. What is its wavelength in nanometers?  2. What is its…

A: Given data: The energy of the photon is, E= 1.5 eV Formula used: The energy of the photon is,…

Q: How can a permanent magnet be demagnetized?

A: The ferromagnetic material which possesses permanent magnetic characteristics even when it is not…

Q: If I cut a wavelength to 1/3 its original length, How would the energy of this photon change?

A:

Q: Determine the photometric balance point of a 30cd and 80cd light source in a photometer. If they are…

A: Given data: The luminous intensity of the first light source, I1=30 cd. The luminous intensity of…

Q: If the human body is well approximated by a black body with tem- perature T = 310◦ K (98.6◦ F). At…

A:

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.