Q3. A microwave transmitter is used to direct microwaves of wavelength 30 mm along a line...

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Q3. A microwave transmitter is used to direct microwaves of wavelength 30 mm along a line XY. A metal plate is positioned at right angles to XY with its mid-point on the line, as shown. transmitter detector metal Y plate When a detector is moved gradually along XY, its reading alternates between maxima and minima. Which one of the following statements is not correct? A The distance between two minima could be 15 mm. B The distance between two maxima could be 30 mm. C The distance between a minimum and a maximum could be 30 mm. D The distance between a minimum and a maximum could be 37.5 mm. Q3. A microwave transmitter is used to direct microwaves of wavelength 30 mm along a line XY. A metal plate is positioned at right angles to XY with its mid-point on the line, as shown. transmitter detector metal Y plate When a detector is moved gradually along XY, its reading alternates between maxima and minima. Which one of the following statements is not correct? A The distance between two minima could be 15 mm. B The distance between two maxima could be 30 mm. C The distance between a minimum and a maximum could be 30 mm. D The distance between a minimum and a maximum could be 37.5 mm.