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What is Fresnel Distance?

What is Fresnel Distance?
 

Grade:12

3 Answers

SAIMANIKANTA
263 Points
6 years ago
The distance beyond which divergence of the beam of width ‘a’ become significant is called
Fresnel distance
 
SAI SANDY
153 Points
5 years ago
The distance beyond which divergence of the beam of width ‘a’ become significant is called
Fresnel distance .
SAI SARDAR
1700 Points
5 years ago
Dear Kajal,
               An Aperture of size illuminated by a parallel beam sends diffracted beam (the central maxima) in angular width approximately . Travelling a distance , it aquires the width due to diffraction. The distance at which this width equals the size of the aperture is called the fresnel distance.

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