Radio waves and Microwaves 2.5 / 5 based on 2 ratings ? PhysicsElectromagnetic SpectrumGCSEOCR Created by: CamCreated on: 16-06-13 14:34 At what frequency are waves reflected off the ionosphere? Below 30 MHz 1 of 5 At what frequency are waves absorbed and scattered? Above 30GHz 2 of 5 How does diffraction change when the wavelength is increased? It happens easier 3 of 5 When do you get maximum diffraction? When the size of the gap is equal to the wavelength 4 of 5 Why are dishes used when transmitting and recieving satellite signals? The microwaves won't diffract much, as the dish is much larger than the wavelength of the microwaves 5 of 5
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