Physics (AS & A Level) · Oct / Nov 2024 · Paper 21 · Question 6
9702
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Two coherent sources X and Y of microwaves of frequency 2.5 × 1010 Hz are a distance of 0.18 m apart in a vacuum, as shown in Fig. 6.1. P Q 2.3 m 0.18 m A O X Y Fig. 6.1 (not to scale) There is a phase difference of 90° between the waves emitted at the two sources. A microwave detector moves along the line PQ, which is parallel to the line joining the two sources and 2.3 m away from it. Point O is on the line PQ at a position that is equidistant from the two sources. Point A is the position on line PQ where the intensity of the microwaves is the greatest.
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6(a)(i)[2]
6(a)(ii)[2]
6(b)(i)[2]
6(b)(ii)[1]
6(b)(iii)[2]
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