Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 10, Problem 3QAP
To determine
Whether the statement is true or false.
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During a nuclear explosion, the core of the explosion reaches temperatures of about 10,000,000 K. What wavelength of light would be emitted by such explosion?
The tungsten wire in a particular incandescent lamp has a temperature of 2.5 · 10 ^ 3 K
a) Which part of the electromagnetic spectrum is dominant in the radiation from this lamp?
(Answer: infrared)
b) Sketch the planck curve for the radiation from the lamp
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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Chapter 10 Solutions
Understanding Our Universe
Ch. 10.1 - Prob. 10.1CYUCh. 10.2 - Prob. 10.2CYUCh. 10.3 - Prob. 10.3CYUCh. 10.4 - Prob. 10.4CYUCh. 10 - Prob. 1QAPCh. 10 - Prob. 2QAPCh. 10 - Prob. 3QAPCh. 10 - Prob. 4QAPCh. 10 - Prob. 5QAPCh. 10 - Prob. 6QAP
Ch. 10 - Prob. 7QAPCh. 10 - Prob. 8QAPCh. 10 - Prob. 9QAPCh. 10 - Prob. 10QAPCh. 10 - Prob. 11QAPCh. 10 - Prob. 12QAPCh. 10 - Prob. 13QAPCh. 10 - Prob. 14QAPCh. 10 - Prob. 15QAPCh. 10 - Prob. 16QAPCh. 10 - Prob. 17QAPCh. 10 - Prob. 18QAPCh. 10 - Prob. 19QAPCh. 10 - Prob. 20QAPCh. 10 - Prob. 21QAPCh. 10 - Prob. 22QAPCh. 10 - Prob. 23QAPCh. 10 - Prob. 24QAPCh. 10 - Prob. 25QAPCh. 10 - Prob. 26QAPCh. 10 - Prob. 27QAPCh. 10 - Prob. 28QAPCh. 10 - Prob. 29QAPCh. 10 - Prob. 31QAPCh. 10 - Prob. 32QAPCh. 10 - Prob. 33QAPCh. 10 - Prob. 34QAPCh. 10 - Prob. 35QAPCh. 10 - Prob. 36QAPCh. 10 - Prob. 37QAPCh. 10 - Prob. 38QAPCh. 10 - Prob. 39QAPCh. 10 - Prob. 40QAPCh. 10 - Prob. 41QAPCh. 10 - Prob. 42QAPCh. 10 - Prob. 43QAPCh. 10 - Prob. 44QAPCh. 10 - Prob. 45QAP
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- If one star has a temperature of 6000 K and another star has a temperature of 7000 K, h much more energy per second will the hotter star radiate from each square meter of its surface?arrow_forwardHydrogen accounts for about 75% by mass of the matter at the surfaces of most stars. However, the absorption lines of hydrogen are strongest (of highest intensity) in the spectra of stars with a surface temperature of about 9000 K. They are weaker in the sun spectrum and are essentially nonexistent in very hot (temperatures above 25,000 K) or rather cool (temperatures below 3500 K) stars. Speculate as to why surface temperature affects the hydrogen absorption lines that we observe.arrow_forwardPhotons of a certain infrared light have an energy of 1.21X 10^-19 J. What is the frequency of this IR light? Use ? = c/f to calculate its wavelength in nanometers.arrow_forward
- What type of spectrum is observed in the light from the sun and other stars? a continuous spectrum consisting of all colors. an emission spectrum. an absorption spectrum consisting of dark lines in a continuous bright background. an atomic spectrum of hydrogen.arrow_forwardWhat 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?arrow_forwardWhat gives rise to spectral lines? What is happening within an atom that causes it to emite light in specific lines in a spectrum?arrow_forward
- Human body temperature is about 310 K (3.10 ✕ 102 K). At what wavelength (in nm) do humans radiate the most energy? In which part of the electromagnetic spectrum (gamma-ray, X-ray, UV, visible light, IR, microwave, or radio) do we emit?arrow_forwardA photon has a frequency of 1.14 x 10^15 Hz. What is the energy of the photon? Recall E = hf, where E is energy in Joules, h is Planck's constant = 6.62 x 10^-34 J/s, and f is frequency (Hz).arrow_forwardPhotons of a certain infrared light have an energy of 1.17x10^-19 J A) what is the frequency of this light ————HZ B) calculate its wavelength in nanometers .arrow_forward
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