Question

A person driving at 17.m/s crosses the line connecting two radio transmitters at right angles, as shown in the figure (d1 = 390 m and d2 = 130.m). The transmitters emit identical signals in phase with each other, which the driver receives on the car radio. When the car is at point A the radio picks up a maximum net signal. (a) What is the longest possible wavelength of the radio waves? 260 m (b) How long after the car passes point A does the radio experience a minimum in the net signal? Assume that the wavelength has the value found in part (a). X S

Answer 1

b) The condition lorimomum intewerence is le=h2 = 1390) 2+vetlá s (Boy-tv242 = 260 = 130 jago)241242. = 130 + 1309314242 18909P+4244= (13072+ 130) +12° +2 (1309) Visom * (390)?= 2.130m 22+2/v30m) (Jásom)?vze J1390m) 34242 = (3901 2-2(130m)? 260 (320m 1240%2 = (1390)2_2180m)2)? Squasuing on bothstes 200 Boom 22:+v24lBee 74888990112740197 024? =39359:03 vt - 198139 m t = 198.39 17 It all167 sec )