2. An O-type star, such as some of the bright young stars in the Orion Nebula,...
2. An O-type star, such as some of the bright young stars in the Orion Nebula, has a surface temperature of roughly 60,000 K. At what wavelength does an O star’s spectrum peak? In what part of the electromagnetic spectrum is this wavelength (e.g. infrared, visible, radio)?
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2. An O-type star, such as some of the bright young stars in the
Orion Nebula,...
Betelgeuse, a bright red star in the constellation Orion, has a luminosity that is 100,000 times...
Betelgeuse, a bright red star in the constellation Orion, has a luminosity that is 100,000 times that of the Sun However, the surface temperature of Betelgeuse is only 3000 K. Assuming that the emissivity of stars is 1, find the radius of Betelgeuse.
A star emits light with a peak wavelength of 9,750 angstroms. What type of star is...
A star emits light with a peak wavelength of 9,750 angstroms. What type of star is this and what is its color? Major stellar spectral types and temperatures Type Color Temperature (K) Comment O Bluish 30,000-80,000 Spectrum with ionized helium and hydrogen but little else; short-lived and rare stars B Bluish 10,000-30,000 Spectrum with neutral helium, none ionized A Bluish 7,500-10,000Spectrum with no helium, strongest hydrogen, some magnesium and calcium F White 6,000-7,500 Spectrum with lonized calcium, magnesium, neutral atoms...
What type of spectrum is shown here? What type of electromagnetic radiation is associated with the...
What type of spectrum is shown here? What type of electromagnetic radiation is associated with the peaks in this spectrum? ultraviolet and visible light infrared radiation radio waves the frequency that causes a nucleus to flip its spin O the vibration frequency of a bond What is measured in this spectroscopic method? the absorption wavelength related to an excited electron state
Our sun's 5800 K surface temperature gives a peak wavelength in the middle of the visible...
Our sun's 5800 K surface temperature gives a peak wavelength in the middle of the visible spectrum. 1. What is the minimum surface temperature for a star whose emission peaks at some wavelength less than 400 nm− that is, in the ultraviolet?
The hot glowing surfaces of stars emit energy in the form ofelectromagnetic radiation. It is...
The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. It is a good approximation to assume that the emissivity e is equal to 1 for these surfaces.Part AFind the radius RRigel of the star Rigel, the bright blue star in the constellation Orion that radiates energy at a rate of 2.7×10^31 W and has a surface temperature of 11,000 K. Assume that the star is spherical.Use σ=5.67×10^−8 W/m2⋅K4 for the Stefan-Boltzmann constant and express your...
O longitudinal and transverse. O longitudinal D Question 2 3 pts An electromagnetic wave is propagating...
O longitudinal and transverse. O longitudinal D Question 2 3 pts An electromagnetic wave is propagating towards the east. At a certain moment the direction of the magnetic field vector associated with this wave points vertically up. What is the direction of the electric field vector? Horizontal and pointing south O Vertical and pointing up 0 Horizontal and pointing north O Vertical and pointing down 3 pts DQuestion 3 order of the electromagnetic spectrum from low to high wavelength? Which...
(20%) Problem 5: There are lots of examples of ideal gases in the universe, and they...
(20%) Problem 5: There are lots of examples of ideal gases in the universe, and they exist in many different conditions. In this problem we will examine what the temperature of these various phenomena are. 25% Part (a) Give an expression for the temperature of an ideal gas in terms of pressure P. particle density per unit volume o, and fundamental constants. T=P k ) Correct! 25% Part (b) Near the surface of Venus, its atmosphere has a pressure f...
Consider two stars: the 5,800 K G-type star the Sun, and the 33,000 K O- type...
Consider two stars: the 5,800 K G-type star the Sun, and the 33,000 K O- type star Orionis. Assume that the atmospheres of both stars are pure H and have a density of 1o kg/m. (a)[15 pts] For both stars, what is the ratio of neutral H atoms in the ground, first and second excited states (n 1, 2 and 3) (b) [15 pts] For both stars, what fraction of H atoms are ionized? Note that the electron density n,...
What was the temperature anomaly in Buffalo, NY on August 27 , 2019? Give your answer...
What was the temperature anomaly in Buffalo, NY on August 27 ,
2019? Give your answer in °C. Answers within ±3°C of the correct
answer are marked correct.
The long-term average temperature for August in Buffalo is 20
°C. Using this information and your answer from Q8, what was the
temperature in Buffalo on August 27, 2019? Give your answer in
°C.
Hotter objects emit _________ than cooler objects
a. more energy at redder wavelengths
b. more energy at bluer...
2. Which one of the following statements about measuring the mass of an isolated star (a...
2. Which one of the following statements about measuring the mass of an isolated star (a star that is not in a binary star system) is correct? a) the mass of the star can be measured accurately only if its luminosity and temperature can be measured b) the mass of the star cannot be measured accurately c) the mass of the star can be measured accurately only if its distance can be found d) the mass of the star can...
Betelgeuse, a bright red star in the constellation Orion, has a luminosity that is 100,000 times that of the Sun However, the surface temperature of Betelgeuse is only 3000 K. Assuming that the emissivity of stars is 1, find the radius of Betelgeuse.
A star emits light with a peak wavelength of 9,750 angstroms. What type of star is this and what is its color? Major stellar spectral types and temperatures Type Color Temperature (K) Comment O Bluish 30,000-80,000 Spectrum with ionized helium and hydrogen but little else; short-lived and rare stars B Bluish 10,000-30,000 Spectrum with neutral helium, none ionized A Bluish 7,500-10,000Spectrum with no helium, strongest hydrogen, some magnesium and calcium F White 6,000-7,500 Spectrum with lonized calcium, magnesium, neutral atoms...
What type of spectrum is shown here? What type of electromagnetic radiation is associated with the peaks in this spectrum? ultraviolet and visible light infrared radiation radio waves the frequency that causes a nucleus to flip its spin O the vibration frequency of a bond What is measured in this spectroscopic method? the absorption wavelength related to an excited electron state
O longitudinal and transverse. O longitudinal D Question 2 3 pts An electromagnetic wave is propagating towards the east. At a certain moment the direction of the magnetic field vector associated with this wave points vertically up. What is the direction of the electric field vector? Horizontal and pointing south O Vertical and pointing up 0 Horizontal and pointing north O Vertical and pointing down 3 pts DQuestion 3 order of the electromagnetic spectrum from low to high wavelength? Which...
(20%) Problem 5: There are lots of examples of ideal gases in the universe, and they exist in many different conditions. In this problem we will examine what the temperature of these various phenomena are. 25% Part (a) Give an expression for the temperature of an ideal gas in terms of pressure P. particle density per unit volume o, and fundamental constants. T=P k ) Correct! 25% Part (b) Near the surface of Venus, its atmosphere has a pressure f...
Consider two stars: the 5,800 K G-type star the Sun, and the 33,000 K O- type star Orionis. Assume that the atmospheres of both stars are pure H and have a density of 1o kg/m. (a)[15 pts] For both stars, what is the ratio of neutral H atoms in the ground, first and second excited states (n 1, 2 and 3) (b) [15 pts] For both stars, what fraction of H atoms are ionized? Note that the electron density n,...
What was the temperature anomaly in Buffalo, NY on August 27 ,
2019? Give your answer in °C. Answers within ±3°C of the correct
answer are marked correct.
The long-term average temperature for August in Buffalo is 20
°C. Using this information and your answer from Q8, what was the
temperature in Buffalo on August 27, 2019? Give your answer in
°C.
Hotter objects emit _________ than cooler objects
a. more energy at redder wavelengths
b. more energy at bluer...
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