Calculating Dish Resolution at 4 GHz with 3m Diameter - Homework Problem

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To calculate the resolution of a dish operating at 4 GHz with a diameter of 3 m, the relevant equation is x = 1.22(y GHz / D), where y represents the wavelength. The user attempts to apply this equation and arrives at a resolution of 1.63 degrees. There is some uncertainty about whether "y GHz" correctly refers to the wavelength. Clarification on the equation's components and their meanings is sought to ensure accurate calculations.
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Homework Statement

A dish operates at a frequency of 4 GHz and has a diameter of 3 m. What is its resolution?



Homework Equations


my take home quiz referres me to a page number in my book for the equation, but I have an older book so I can't find it. i think it is the equation for the Limiting angle of resolution of a circular aperture, but I am not sure. something like:
x = 1.22(y GHz/ D) is this what I am looking for?


The Attempt at a Solution


If I try it with this equation I get: 1.63 degrees. any help is appreciated. thanks.
 
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x = 1.22(y GHz/ D) is this what I am looking for?

As long as "y GHz" means the wavelength.
 

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