Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 5, Problem 22Q
To determine
The wavelength of maximum emission for a temperature around
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A blackbody radiator in the shape of a sphere has a surface area of 15 ^ 2 * m . if it has a temperature of 1200 K how much energy does it emit per second?
A particular blackbody has a radiation spectrum that peaks at a wavelength of 660 nm.
Part (a) What is the temperature of the blackbody in units of Kelvin?
Part (b) If the temperature of a blackbody is 4300 K, at what wavelength, in units of nanometers, does it radiate the most energy?
Assume you are a perfect blackbody at a temperature of T = 310 K. What is the
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Chapter 5 Solutions
Universe
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Ch. 5 - Prob. 11CCCh. 5 - Prob. 12CCCh. 5 - Prob. 13CCCh. 5 - Prob. 14CCCh. 5 - Prob. 1CLCCh. 5 - Prob. 2CLCCh. 5 - Prob. 3CLCCh. 5 - Prob. 1QCh. 5 - Prob. 2QCh. 5 - Prob. 3QCh. 5 - Prob. 4QCh. 5 - Prob. 5QCh. 5 - Prob. 6QCh. 5 - Prob. 7QCh. 5 - Prob. 8QCh. 5 - Prob. 9QCh. 5 - Prob. 10QCh. 5 - Prob. 11QCh. 5 - Prob. 12QCh. 5 - Prob. 13QCh. 5 - Prob. 14QCh. 5 - Prob. 15QCh. 5 - Prob. 16QCh. 5 - Prob. 17QCh. 5 - Prob. 18QCh. 5 - Prob. 19QCh. 5 - Prob. 20QCh. 5 - Prob. 21QCh. 5 - Prob. 22QCh. 5 - Prob. 23QCh. 5 - Prob. 24QCh. 5 - Prob. 25QCh. 5 - Prob. 26QCh. 5 - Prob. 27QCh. 5 - Prob. 28QCh. 5 - Prob. 29QCh. 5 - Prob. 30QCh. 5 - Prob. 31QCh. 5 - Prob. 32QCh. 5 - Prob. 33QCh. 5 - Prob. 34QCh. 5 - Prob. 35QCh. 5 - Prob. 36QCh. 5 - Prob. 37QCh. 5 - Prob. 38QCh. 5 - Prob. 39QCh. 5 - Prob. 40QCh. 5 - Prob. 41QCh. 5 - Prob. 42QCh. 5 - Prob. 43QCh. 5 - Prob. 44QCh. 5 - Prob. 45QCh. 5 - Prob. 46QCh. 5 - Prob. 47QCh. 5 - Prob. 48QCh. 5 - Prob. 49QCh. 5 - Prob. 50QCh. 5 - Prob. 51Q
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- Our Sun has a surface temperature of about 5800 K. Find the emitted power per square meter of peak intensity for a similar star with 4600 K that emits thermal radiation. Express your answer in scientific notation and with three significant figures.arrow_forwardIf it takes 10.2 eV of energy excite hydrogen from the ground state into the first excited (n = 2) state, then what frequency photon is required to excite hydrogen out of the ground state into n = 2 state? What is the wavelength (λ) of that photon? What kind of radiation (region of the electromagnetic spectrum) is this photon?arrow_forwardThe Sun radiates almost like a perfect blackbody at a temperature of T= 5800 K. a) Show, using the Stefan-Boltzmann law, that the rate at which it radiates energy is - 4x1026 W. b) If you were at Earth's orbit, in space, how many Sun photons would reach you per second? Assume you have a mass of 70 kg, are spherical and full of water. You may need to find your cross sectional area and assume all Sun photons move in the same direction.arrow_forward
- A certain blackbody emits electromagnetic radiation at 2500K. What is the wavelength of the radiation emitted?arrow_forwardA black body measures 20cm by 15cm. If the temperature of the object is 2500K how much energy does it emit per second?arrow_forwardB2. A spherical star is detected by an astronaut in a spacecraft at a distance z of 1.5×10¹2 kilometers. The star can be regarded as a blackbody with a temperature of 11,300 K. The radius r of the star is 3.5×106 kilometers. (a) Calculate the radiant exitance and the radiant intensity of the star. (b) Calculate the irradiance that can be detected by the astronaut. (c) The photodetector used by the astronaut in the spacecraft has a responsivity of 120 kV/W and an photosensitive area of 0.5 mm². Calculate the output voltage of the detector in the detection of the star. CAMINS +II+ Figure B2arrow_forward
- What wavelength (in nanometers) is the peak intensity of the light coming from a star whose surface temperature is 8888 Kelvin? Calculate total energy radiated per unit area by a black body at this temperature.arrow_forwardThe Sun has a temperature of approximately 5800 K. a) What is the peak wavelength of light emitted by the Sun? b) How much energy does one photon of this wavelength have? c) How much power is emitted by the Sun if it has an emissivity of 0.9? (The Sun has a radius of 6.96x10^8 m.) d) How much mass is converted to energy every second in the Sun's core to drive its power emission? Please write your answers in the space below and email your work. ALT+510(BOLO ALTHEN+510 (Mac)arrow_forwardSuppose a blackbody at 425 K radiates just enough heat in 15.0 min to boil water for a cup of tea. How much time t will it take to boil the same water if the temperature of the radiator is 525 K? t = ? sarrow_forward
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