To what temperature must we heat an object until its peak thermal radiation is in the red region of the spectrum (λ = 650 nm)?
Q: (b) What is the surface temperature of the star? 4274.3 X K (c) At what rate is energy emitted from…
A: b) The star’s surface temperature can be determined by Wein’s displacement law as, Here, T, b, and…
Q: on has a momentum of 8.5 × 10-21 kg⋅m/s. What is its wavelength in meters? Calculate its energy in…
A: GivenMomentum of photon, p=8.5×10-21 kg m/s
Q: The thermal (black-body) radiation from a star peaks at a wavelength of 300 nm. What is the surface…
A: Given wavelength corresponding to peak radiation is λp =300nm=300x10-9m
Q: What is the energy in joules of an x-ray photon with wavelength 3.10 ✕ 10−10 m? J (b) Convert the…
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Q: The root mean square speed of the hydrogen molecules at temperature t°C is given by 3x8.31 x (t+273)…
A: Given Rms speed at t0C vrms=3×8.31×(t+273)2×10-3 Temperature T=240 C Mass of hydrogen molecule…
Q: The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E < hf…
A: Given that Work function W = 3.2 X 10-19 J Speed of emitted electrons u = 8 X 105 m/s
Q: A particular blackbody has a radiation spectrum that peaks at a wavelength of 660 nm. Part (a)…
A: Given, Wavelength = 660 nm We need to calculate, (a) Temperature =? (b) If temperature =4300K…
Q: How many watts will be radiated from a spherical black body 15 cm in diameter at a temperature of…
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Q: The operating temperature of an indirectly heated filament of a vacuum tube is around 1050K. At what…
A: Wein’s law equation is,
Q: What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which…
A: According to Wein’s displacement law, the temperature is given by
Q: A blackbody has a temperature of 5 K. At what wave-length is it brightest?
A: A black body is defined as an ideal body that can absorb all the radiations that fall on it. The…
Q: The intensity of the emitted radiation by a star is at a maximum at a wavelength of 78.9 nm. a)…
A: The maximum radiation is emitted by the given star at a wavelength λ= 78.9nm = 78.9x10-9m a) The…
Q: b. An electron and a photon has the same wavelength of 0.21 nm. Calculate the momentum and energy…
A: From Debroglie's theory of matter-wave duality, given the wavelength λ of a particle, the momentum…
Q: hotons of a certain infrared light have an energy of 1.33 * 10-19 J. (a) What is the frequency of…
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Q: A black body radiates energy, the highest intensity radiation is at a wavelength of 164 nm. What is…
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Q: The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E < hf…
A: Work function of the metal W=3.2×10-19J Velocity of the electron v=8×105 m/s Speed of light…
Q: he surface temperature of the Sun is 5000℃. a) Find the magnitude of the peak wavelength of…
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Q: The spectrum of light from a star is, to a good approximation, a blackbody spectrum. The red…
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Q: A log in the fire is glowing red (λ = 629 nm). What is the temperature of the log, in kelvin?
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Q: An infrared satellite measures outgoing radiation that leaves Earth's surface through an atmospheric…
A: The expression for the spectral radiance is, Fλ=2πhc2λ5ehcλkT-1
Q: What is the wavelength, in nm, of a light wave with a frequency of 4 * 10^15 Hz?
A: Given that the frequency of the light wave is f=4×1015 Hz. The wavelength of the light can be…
Q: A photon has an energy of 2.44x10^-22 J. What is its frequency?
A: Given Data: The energy of a photon is: E=2.44×10-22 J The energy of a photon is given by, E=hf Here,…
Q: What is the frequency of a photon having energy 2.1 X 10-30 J?
A: E = 2.1 X 10-30 JFrequency, v = ?We know, Energy = hv, where h is the Planck’s ConstantTherefore, v…
Q: The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E < hf…
A: Given that Work function of the sodium is W=3.2×10-19 J Speed of the emitted electron or…
Q: Roughly what frequency and what kind of light would you need to be able to separate an electron from…
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Q: A blackbody (a hollow sphere whose inside is black) emits radiation when it is heated. The emittance…
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Q: A photon has 1.86 eV of energy. What is the photon’s wavelength? (h = 6.626 x 10-34, 1 eV = 1.6 x…
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Q: What is the maximum wavelength emitted by a blackbody whose temperature is 2900 K
A: Using wein's displacement formula which give the relation between maximum wavelength emitted by a…
Q: What temperature, in °C, is a blackbody whose emission spectrum peaks at 320 nm ? 5. ΑΣΦ ?
A: A: The given wavelength is λ=320 nm=320×10-9 m The Wiens constant is b=2.82×10-3 mK Applying Wiens…
Q: What is the wavelength of a photon with frequency f= 5x10^14 Hz?
A: Given data f=5×1014 Hz
Q: The frequency of a transition is 5.4 × 1015 Sec-1. What is the corresponding wavelength
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Q: The temperature of an object is 310 K. The electromagnetic radiation emitted by this object is: O in…
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Q: An asteroid is hurtling toward earth at 150,000". The temperature of the asteroid is about 100 K,…
A: We have to use Wien's displace law for this problem. According to this law peak of the radiation…
Q: A photon has a wavelength in a vacuum of 500nm, if its energy is doubled, what is the associated…
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Q: What is the frequency (in Hz) of an ultraviolet photon with wavelength 139 nm? Express your answer…
A: Given that the wavelength of an ultraviolet photon is 139nm.Write the expression for frequency of an…
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