EBK COSMIC PERSPECTIVE, THE
EBK COSMIC PERSPECTIVE, THE
8th Edition
ISBN: 8220101465108
Author: Voit
Publisher: PEARSON
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Chapter S4, Problem 54EAP

Be sure to show all calculations clearly and state your final answers in complete sentences.

54. An Eiectron's Quantun Uncertainly. Yon are conducting an experiment in which you can measure the location of individual electron collisions to within 10-10 m. What is the theoretical limit to which you can simultaneously measure the momentum of those collisions? What is the uncertainty in the election's speed? (The electron has a rest mass of 9 . 1 × 1 0 31 kg.)

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Problem 2. The redshift is defined to be the quantity Job – Xem Xem where Aob and Aem are respectively the wavelengths at which radiation is observed and emitted. 1. Find the corresponding definition in terms of observed and emitted frequencies fob and fem. 2. The observed frequency of radio waves from a distant galaxy is 5 GHz. At the location of galaxy, the frequency is 6 GHz. Calculate the redshift of the galaxy. 3. If the galaxy was 500 Mpc away from the Milky way when the radio waves were emitted. How far away is this galaxy today?
1. What is meant by a 'black' body ? How can we make an almost ideal blackbody in the lab ? 2. What is the UV catastrophe ? How it was solved ?
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