Question

can someone show me how they get the answer of 7 maxima?

Coherent microwave light with a wavelength λ = 1 5cm is incident on a d= 5.0 cm. double slit barrier, producing an interference pattern of a number of maxima and minima. A detector is free to swing around the full 180° in order to find the presence of interference maxima and minima. How many different maxima will this detector detect, as it is allowed to swing around the full 180° (Include maxima on both sides of the centerline in your count.) 5. detector a six. b. nine. c. five. d. seven. e. three. microwave source site

Answer 1

For maxima m=d/ $\lambda$ =(5×10^-2m )/(1.5×10^-2m)

m=3

Total number of maxima s are N=2(3)+1=7

Answer is SEVEN