ASTRONOMY TODAY (LL) >CUSTOM PACKAGE<
17th Edition
ISBN: 9781323745649
Author: Central Texas
Publisher: PEARSON C
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Chapter 3, Problem 3P
To determine
The temperature
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Suppose YOUR body temperature averages 98.6 F.
1. How much radiant energy in Wm^-2 is emitted from YOUR body?
2. What is the total radiant energy in W that is emitted from YOUR body?
3. At what wavelength does YOUR body emit the largest amount of radiant energy?
If a sunspot has a temperature of 4,430 K and the sunspot can be considered a blackbody, what is the wavelength (in nm) of maximum intensity of the sunspot's radiation?
What wavelength ( in nanometers ) is the peak intensity of the light coming from a star whose surface temperature is 4987 Kelvin? What color would we see with our eyes?
Chapter 3 Solutions
ASTRONOMY TODAY (LL) >CUSTOM PACKAGE<
Ch. 3 - Prob. 1DCh. 3 - Prob. 2DCh. 3 - Prob. 3DCh. 3 - Prob. 4DCh. 3 - Prob. 5DCh. 3 - Prob. 6DCh. 3 - Prob. 7DCh. 3 - Prob. 8DCh. 3 - Prob. 9DCh. 3 - Prob. 10D
Ch. 3 - Prob. 11DCh. 3 - Prob. 12DCh. 3 - Prob. 13DCh. 3 - Prob. 14DCh. 3 - Prob. 15DCh. 3 - Prob. 1MCCh. 3 - Prob. 2MCCh. 3 - Prob. 3MCCh. 3 - Prob. 4MCCh. 3 - Prob. 5MCCh. 3 - Prob. 6MCCh. 3 - Prob. 7MCCh. 3 - Prob. 8MCCh. 3 - Prob. 9MCCh. 3 - Prob. 10MCCh. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8P
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- What is the peak wavelength of a blackbody with a temperature of 9000 K?arrow_forwardHow many watts of radiation does a 1-meter-square region of the Sun’s spot emit, at a temperature of 5000 K? How much would the wattage increase if the temperature of the spot were twice as much, 10 000 K?arrow_forwardA 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?arrow_forward
- Shortwave radio is broad between 3.50 and 29.7MHz. To what range of wavelengths does this correspond? Why do you suppose this part of the spectrum is called shortwave radio?arrow_forwardWhat is the wavelength of maximum intensity (in nm) and the total energy emitted (in J/s/m2) by a celestial object at 9 K above absolute zero? wavelength of maximum intensity nm ?total energy J/s/m2?arrow_forwardHuman eyes are best equiped to see light which is in the yellow-green part of the spectrum because the surface of the sun is about 5000 K. If the surface of the sun were only half as hot, where would the peak in the spectrum be? A) UV B) Blue C) Infrared D) Redarrow_forward
- If 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_forwardWhat is the significance of the blackbody radiation spectrum in understanding the behavior of electromagnetic radiation and the principles of thermal equilibrium?arrow_forwardWhat is the frequency of the EM wave emitted most strongly by a glowing element on a stove with temperature 1,568 K?arrow_forward
- The greenhouse effect can be explained easily if you understand the laws of blackbody radiation. A greenhouse gas blocks the transmission of infrared light. Given that the incoming light to Earth is sunlight with a characteristic temperature of 5800 K (which peaks in the visible part of the spectrum) and the outgoing light from Earth has a characteristic temperature of about 300 K (which peaks in the infrared part of the spectrum), explain how greenhouse gases cause Earth to warm up. As part of your answer, discuss that greenhouse gases block both incoming and outgoing infrared light. Explain why these two effects don’t simply cancel each other, leading to no net temperature change.arrow_forwardA black body radiator in the The shape of a sphere has a surface area of 1.1 m². If the temperature of the object is 1015 K how much energy (in watts) does it emit per second?arrow_forwardAn object at an initial temperature of 27 degrees C is raised to a temperature of 877 degrees C. How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature? a. 32.5 b. 215.9 c. 864.5 d. 1,113,123arrow_forward
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