With a He-Ne laser of wavelength 11.5x 10-7 m, fringes remain clearly visible when the path difference is increased up to 10 m. Calculate the coherence length, coherence time and the spectral half width for He-Ne laser.

With a He-Ne laser of wavelength 11.5x 10-7 m, fringes remain clearly visible when the path difference is increased up to 10 m. Calculate the coherence length, coherence time and the spectral half width for He-Ne laser.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter4: Diffraction

Section: Chapter Questions

Problem 72P: X-rays of wavelength 0.103 nm reflects off a crystal and a second-order maximum is recorded at a...

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1. With a He-Ne laser of wavelength 11.5x 10-7 m, fringes remain clearly visible when
the path difference is increased up to 10 m. Calculate the coherence length, coherence
time and the spectral half width for He-Ne laser.

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