Plane microwaves are incident on a thin metal sheet that has a long, narrow slit of width 4.8 cm in it. The microwave radiation
strikes the sheet at normal incidence. The first diffraction minimum is observed at θ = 42°. What is the wavelength of the microwaves?
1 answer:
Answer:

Explanation:
given,
width of narrow slit = 4.8 cm
minimum angle of diffraction = θ = 42°
wavelength of the microwave = ?
condition for the diffraction for single slit diffraction
for the first minima m = 1
wavelength of microwave radiation is equal to
the wavelength of microwaves is equal to 
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