Surface roughness are often tested using __________(a) Rayleigh criterion(b) Lawson criterion(c) Barkhausen stability criterion(d) Nyquist criterionThe question was posed to me during an internship interview.My doubt is from Scattering in section Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Surface roughness are often tested using __________(a) Rayleigh criter

1.	Surface roughness are often tested using __________(a) Rayleigh criterion(b) Lawson criterion(c) Barkhausen stability criterion(d) Nyquist criterionThe question was posed to me during an internship interview.My doubt is from Scattering in section Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile
Answer» Right choice is (a) Rayleigh criterion The BEST explanation: Rough surface is often tested using a Rayleigh criterion. It defines the CRITICAL height of surface protuberances for a GIVEN angle of incidence. The Rayleigh criterion is the criterion for the minimum resolvable detail. The IMAGING process is said to be diffraction-limited when the first diffraction minimum of the image of one source point coincides with the MAXIMUM of another.

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