Loose Leaf For Explorations:  Introduction To Astronomy
Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 5, Problem 6TY
To determine

The effect of ionized gas in interstellar space on the observation of pulsing radio signals from a stellar remnant in a distant part of the Milky Way.

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Consider the 100-MHz radio waves used in an MRI device.  Part (a)  What is the wavelength, in meters, of these radio waves?   Part (b)  If the frequencies are swept over a ±9.5 MHz range centered on 100 MHz, what is the minimum, in meters, of the range of wavelengths emitted?  Part (c)  What is the maximum, in meters, of this wavelength range?
Follow up questions: Sunburn (and skin cancer) is caused by ultraviolet light waves having a frequency of around 1.02×10^16 Hz. What is their wavelength? It has been suggested that extraterrestrial civilizations (if they exist) might try to communicate by using electromagnetic waves having the same frequency as that given off by the spin flip of the electron in hydrogen, which is 1.43 GHz. To what wavelength should we tune our telescopes in order to search for such signals? Microwave ovens cook food with electromagnetic waves of frequency around 2.45 GHz. What wavelength do these waves have?
What is the wavelength of an FM radio station that broadcasts at 101.1 MHz? Assume speed of light 3*10 to the power 8m/s. Round your answer two decimal places.
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