Concept explainers
(a)
The power
(a)
Answer to Problem 8P
The power radiated by the black body is
Explanation of Solution
Write the expression for the power radiated by the black body.
Here,
Conclusion:
Substitute
Thus, the power radiated by the black body is
(b)
The wavelength at which the blackbody radiate most intensely.
(b)
Answer to Problem 8P
The wavelength at which the blackbody radiate most intensely is
Explanation of Solution
Write the equation for the wavelength at which the blackbody radiate most intensely.
Here,
Conclusion:
Substitute
Thus, the wavelength at which the blackbody radiate most intensely is
(c)
The spectral power per wavelength interval at
(c)
Answer to Problem 8P
The spectral power per wavelength interval at
Explanation of Solution
Write the equation for
Here,
Write the equation for
Here,
Write the equation for the power per wavelength interval.
Substitute
Conclusion:
Substitute
Substitute
Substitute
Thus, the spectral power per wavelength interval at
(d)
The spectral power per wavelength interval at
(d)
Answer to Problem 8P
The spectral power per wavelength interval at
Explanation of Solution
From the equation (V) in part (c), the spectral power per wavelength is.
Conclusion:
Substitute
Thus, the spectral power per wavelength interval at
(e)
The spectral power per wavelength interval at
(e)
Answer to Problem 8P
The spectral power per wavelength interval at
Explanation of Solution
From the equation (V) in part (c), the spectral power per wavelength is.
Conclusion:
Substitute
Thus, the spectral power per wavelength interval at
(f)
The spectral power per wavelength interval at
(f)
Answer to Problem 8P
The spectral power per wavelength interval at
Explanation of Solution
From the equation (V) in part (c), the spectral power per wavelength is.
Conclusion:
Substitute
Thus, the spectral power per wavelength interval at
(g)
The spectral power per wavelength interval at
(g)
Answer to Problem 8P
The spectral power per wavelength interval at
Explanation of Solution
From the equation (V) in part (c), the spectral power per wavelength is.
Conclusion:
Substitute
Thus, the spectral power per wavelength interval at
(h)
The spectral power per wavelength interval at
(h)
Answer to Problem 8P
The spectral power per wavelength interval at
Explanation of Solution
From the equation (V) in part (c), the spectral power per wavelength is.
Conclusion:
Substitute
Thus, the spectral power per wavelength interval at
(I)
The spectral power per wavelength interval at
(I)
Answer to Problem 8P
The spectral power per wavelength interval at
Explanation of Solution
From the equation (V) in part (c), the spectral power per wavelength is.
Conclusion:
Substitute
Thus, the spectral power per wavelength interval at
(J)
The power radiated by the object as visible light.
(J)
Answer to Problem 8P
The power radiated by the object as visible light is
Explanation of Solution
The wavelengths
Write the equation for the power radiated.
Here,
Conclusion:
The average power is calculated from the visible area.
Substitute
Thus, the power radiated by the object as visible light is
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Chapter 39 Solutions
Physics for Scientists and Engineers with Modern Physics
- 1arrow_forwardSuppose a star with radius 8.51 108 m has a peak wavelength of 689 nm in the spectrum of its emitted radiation. (a) Find the energy of a photon with this wavelength. J/photon(b) What is the surface temperature of the star? K(c) At what rate is energy emitted from the star in the form of radiation? Assume the star is a blackbody (e = 1). W(d) Using the answer to part (a), estimate the rate at which photons leave the surface of the star. photons/sarrow_forwardSuppose a star with radius 8.69 x 10° m has a peak wavelength of 684 nm in the spectrum of its emitted radiation. (a) Find the energy of a photon with this wavelength. 0.029e-17 J/photon (b) What is the surface temperature of the star? 4274.3 X K (c) At what rate is energy emitted from the star in the form of radiation? Assume the star is a blackbody (e = 1). 1.9934e17 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. W (d) Using the answer to part (a), estimate the rate at which photons leave the surface of the star. X photons/sarrow_forward
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- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning