Uhf radio wave - determine frequency

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Homework Help Overview

The problem involves determining the frequency of a UHF radio wave based on the shortest distance between positions where the electric and magnetic fields are zero, given as 0.34 m. The context is rooted in wave properties and relationships between wavelength and frequency.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to calculate frequency by dividing the speed of light by the given distance. Some participants question how the distance relates to wavelength, while others suggest visualizing the wave through sketching to better understand the concept.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. Some guidance has been offered regarding the relationship between wave properties, but no consensus has been reached on the approach to the solution.

Contextual Notes

There appears to be uncertainty regarding the definition of the shortest distance mentioned in the problem and its implications for wavelength. Participants are also navigating the relationship between wave characteristics and their mathematical representations.

flynostrich08
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Homework Statement


in a certain uhf radio wave, the shortest distance between postions at which the elctric an magnetic fields are zero is .34m. determine the frequency of this uhf radio wave


The Attempt at a Solution



i basically just divided (3x10^8)/.34 = (8.8x10^8) that is c/d=frequency
can anyone tell me if that is the correct way to approach the problem? thanks
 
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How is the "shortest distance between postions at which the elctric an magnetic fields are zero" related to the wavelength?
 


i don't know
 


flynostrich08 said:
i don't know
You might want to start by sketching a simple sine wave on a piece of paper. Let y be the vertical axis and t be the horizontal axis.

y = Asin(2πt)

Plot the sine wave for a few periods. Make sure to count how many wavelengths you have drawn. Then count how many times the sine wave crosses the t axis. Compare the two.
 

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