UNDERSTANDING THE UNIVERSE(LL)-W/CODE
3rd Edition
ISBN: 9780393869903
Author: PALEN
Publisher: NORTON
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Chapter 10, Problem 3QAP
To determine
Whether the statement is true or false.
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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
Photons 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.
9
Chapter 10 Solutions
UNDERSTANDING THE UNIVERSE(LL)-W/CODE
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_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
- Photons 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_forwardIf you observe a star’s blackbody spectrum twice, once from Earth and once from a space shuttle above Earth’s atmosphere, what will you see? An absorption spectrum from Earth and a continuous spectrum from space An absorption spectrum from space and a continuous spectrum from Earth An absorption spectrum from space and an absorption spectrum with more absorption lines from Earth An absorption spectrum from Earth and an absorption spectrum with more absorption lines from spacearrow_forwardBlack Body Radiation 1. Using the Kelvin Wavelength Graph below, what colour will the sun be if it is 5,778 degrees kelvin? P 6000 K 3000 K 1500 K 750 K 375 K infrared Wavelength (x 10° nm) Intensity ultraviolet visible 3.arrow_forward
- What is the momentum of a photon with an energy of 9.9*10^-13J a) 3.3 x 10^-21 kgm/s b) 2.0x 10^-21 kgm/s c)3.3 x 10^-5 kgm/s d)2.0x10^-5 kgm/s e)arrow_forwardMultiply the following BINARY NUMBERS 10101.1111 X 101.11 (Note: The problem should be solved in separate paper with steps and scanned copy should be submitted along with other answers The final answer must also be entered in the boxes below. Enter only one bit in a box and fill the unused boxes if any, with zeros) Answer - Integer part = Answer - Fractional part=arrow_forwardPlot the spectral emittance the five bodies in our solar system Listed here: Sun (6000 K) Venus (600 K) Earth (300 K) Mars (200 K) Titan (120 K)arrow_forward
- Determine the energy of a cosmic rays' photon, if its wavelength is 1.24 x 10-14m? (h = 6.63 x 10-34Js) Group of answer choices 2.74 x 10-58J 8.22 x 10-48J 5.34 x 10-20J 1.60 x 10-11Jarrow_forwardWhy don’t we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K? a. There is no hydrogen in stars this cool. b. The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy. c. These stars are so cool that nearly all of the hydrogen atoms are in the ground state. d. Stars of this temperature are too cool to produce an absorption spectrum. e. Stars of this temperature are too hot to produce an absorption spectrum.arrow_forwardA photon has a frequency 4873935 Hz. Calculate its energy in Joules. Answer in Scientific Notation. Round your answer to 2 significant figures.arrow_forward
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