DIFFRACTION PROBLEM (physics lab)

AI Thread Summary
To solve the diffraction problem involving a radar antenna covering the Moon, the relevant equation is the diffraction limit, which relates the diameter of the antenna to the wavelength and the distance to the target. The central spot size of the diffraction pattern can be calculated using the formula for the angular resolution, which is influenced by the antenna's diameter and the radar wavelength. Given the Moon's distance of 4*10^8 m and its diameter of 3.2*10^6 m, the necessary calculations will determine the required antenna size. Participants are encouraged to attempt solving the problem independently before seeking assistance. Understanding the principles of diffraction is crucial for accurately determining the antenna's diameter.
mjsteves
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One of my prelab problems for physics 3:

The Moon is about 4*10^8 m from the Earth and has a diameter of about 3.2*10^6 m. You want a radar antenna which just covers the Moon with the central spot of its diffraction pattern. If the radar wavelength is 10 cm, what is the diameter of the radar antenna?
 
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What equation or equations do you have that deal with diffraction?
 
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