Since an absorbing gas re-emits the light it absorbs, why are there dark lines in an absorption spectrum? That is, why doesn’t the re-emitted light simply fill in the dark places?

Q: Calculate the radiance of a 4,456-K blackbody at a wavelength

A: Given data: Temperature, T=4456 K Wavelength, λ=632 nm=632×10-9m Known data: Planck's constant,…

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

A: Surface temperature is T = 4987 K

Q: During a nuclear explosion, the core of the explosion reaches temperatures of about 10,000,000 K.…

A: We know that  wiens law   λmax = b / T b = 2.897×10−3 m⋅K T = Absolute temp in  K λmax = peak wave…

Q: Calculate the energy emitted by a blackbody at 1000°C per square meter?

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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 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: The temperature of a blackbody is 5505 o (a).  What is the wavelength of the peak of the blackbody…

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Q: Normal human body temperature is about 37°C. What is the peak wavelength emitted by a person with…

A: To calculate the wavelength of the radiation emitted by a human body we can consider the human body…

Q: Human body temperature is about 310 K (3.10 x 102 K). At what wavelength (in nm) do humans radiate…

A: Using Wein's displacement law    Where T = Temperature of an object              = Wavelength of…

Q: A star has the peak of its blackbody spectrum occur at a wavelength of 271 nm. What is its…

A: According to Wien’s displacement law,

Q: The human eye is most sensitive to light of wavelength 5.50 x 10^-7 m which is the green yellow…

A: Given :     Wavelength of green yellow region, λgy = 5.5×10-7 m               This wavelength…

Q: If you see a “violet-hot” star, you can be certain its peak intensity is in the ultraviolet range.…

A: Objects start to glow red at about  . As they get hotter, they will appear orange, yellow, white and…

Q: Why does the light emitted from excited atoms (like hydrogen or other elements) occur at specific…

A: The electrons in an atom can only occupy certain allowed energy levels. This was one of the early…

Q: If the temperature of a black body is increased from 500k to 1000k , by what factor, the rate of…

A: The rate of emission of energy from a Blackbody denoted by  j  is given by Stefan-Boltzmann Law…

Q: Can you give examples for blackbodies? Is the sun a blackbody? Is the moon a blackbody? Is the LED a…

A: BLACK BODY; Definition A black body is a  type of a body ore we can say a type of a surface that can…

Q: How many watts of radiation does a 1-meter-square region of the Sun’s spot emit, at a temperature of…

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Q: A blue-hot star is about twice as hot as a red-hot star. But the temperatures of the gases in…

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Q: a) The blackbody radiation emitted from a furnace peaks at a wavelength of 4.5 10-6 m (0.0000045 m).…

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Q: If you double the temperature of a blackbody, by what factor will the total energy radiated per…

A: A blackbody is an ideal object that is capable of absorbing all the radiation that falls on it. The…

Q: A blackbody is brightest at a wavelength of 800 nm. At what wavelength would the blackbody be…

A: A blackbody is defined as an ideal body capable of absorbing all the radiation that falls on it.…

Q: If a star has a surface temperature of 5000 K what will the maximum wavelength emitted by the star…

A: Stars are often considered as a blackbody for studying their properties. A black body is an ideal…

Q: Why do hot stars look bluer thar

A: For studying stars they are considered as blackbodies. A blackbody is an ideal body that is capable…

Q: When astronomers look at the spectrum of the Sun, they noticed that the light from one edge is…

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Q: If you see a red-hot star, you can be certain that its peak intensity is in the infrared region. Why…

A: The red hot star

Q: A lightbulb manufacturer makes bulbs with different "color temperatures," meaning that the spectrum…

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Q: A photon has a wavelength of 581 nm. What is the energy of the photon (in units of 10-19 Joules)?…

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Q: An atom has its electron in the energy level at - 1.2 eV. It absorbs a photon, which promotes the…

A: here, initial energy of electron, E1 = -1.2eV final energy of electron, E2 = -0.4eV let the energy…