(C) Microwaves have a short wavelength,which allows them to be transmitted in straight lines with minimal diffraction. Due to this property,they are h

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(C) Microwaves have a short wavelength,which allows them to be transmitted in straight lines with minimal diffraction. Due to this property,they are highly effective for detecting objects and determining their distance,speed,and direction. Therefore,microwaves are extensively used in $Radar$ (Radio Detection and Ranging) systems.