Q10.21Multiple choice
Four identical monochromatic sources A,B,C,D as shown in the (Fig.10.7) produce waves of the same wavelength λ and are coherent. Two receiver R1 and R2 are at great but equal distaces from B.
This question refers to a figure in the original PDF.
- (i)Which of the two receivers picks up the larger signal?
- (ii)Which of the two receivers picks up the larger signal when B is turned off?
- (iii)Which of the two receivers picks up the larger signal when D is turned off?
- (iv)Which of the two receivers can distinguish which of the sources B or D has been turned off? R2 /2 /2 R1 A B C R1B = d = R2B /2 AB = BC = BD = λ/2 Fig. 10.7 Wave Optics