The ray optics is valid till this distance as the bending of light due to wave nature is not significant.
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From the equation of first minimum of the diffraction pattern we have,
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From the definition of Fresnel's distance ( ) we have ( refer to the figure)
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Comparing we get,
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This is the least distance till the diffraction is noticeble.
\n\n"},"comment":{"@type":"Comment","text":"Distance till the bending of light is not appriciable."},"encodingFormat":"text/markdown","learningResourceType":"Practice problem","suggestedAnswer":[],"text":"What is Fresnel's distance? Obtain equation for Fresnel's distance."},"name":"Quiz on Wave Optics","typicalAgeRange":"10-17","url":"https://www.embibe.com/questions/What-is-Fresnel%27s-distance%3F-Obtain-equation-for-Fresnel%27s-distance./EM6953800"}
Embibe Experts Solutions for Chapter: Wave Optics, Exercise 1: Exercise
Author:Embibe Experts
Embibe Experts Physics Solutions for Exercise - Embibe Experts Solutions for Chapter: Wave Optics, Exercise 1: Exercise
Attempt the free practice questions on Chapter 10: Wave Optics, Exercise 1: Exercise with hints and solutions to strengthen your understanding. Physics Crash Course (Based on Revised Syllabus-2023) solutions are prepared by Experienced Embibe Experts.
Questions from Embibe Experts Solutions for Chapter: Wave Optics, Exercise 1: Exercise with Hints & Solutions
What is the minimum angular separation between two stars if telescope is used to observe them with an objective of circular aperture The wavelength of light used is .