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Grade 12Wave Optics

What is Fresnel Distance?

Profile image of kajal
10 Years agoGrade 12
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3 Answers

Profile image of SAIMANIKANTA
ApprovedApproved Tutor Answer10 Years ago
The distance beyond which divergence of the beam of width ‘a’ become significant is called
Fresnel distance
 
Profile image of SAI SANDY
10 Years ago
The distance beyond which divergence of the beam of width ‘a’ become significant is called
Fresnel distance .
Profile image of SAI SARDAR
10 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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