Question

With a He-Ne laser of wavelength 11.5×10^(-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 the He-Ne laser.

Name: with a he ne laser of wavelength 115107m fringes remain clearly visible whenthe path difference is increased up to 10 m calculate the coherence length coherencetime and the spectral half wid 29012
Uploaded: 2023-02-08T09:38:13-08:00
Duration: 1 min 48 s
Channel: Madhur L
Description: with a he ne laser of wavelength 115107m fringes remain clearly visible whenthe path difference is increased up to 10 m calculate the coherence length coherencetime and the spectral half wid 29012

          With a He-Ne laser of wavelength 11.5×10^(-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 the He-Ne laser.

Added by Victoria T.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

02/08/2023

Step 1

We are given: - The wavelength of the He-Ne laser, \(\lambda = 11.5 \times 10^{-7}\) m. - The maximum path difference for which fringes remain clearly visible, \(\Delta L = 10\) m. This path difference is also known as the coherence length (\(L_c\)). Show more…

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With a He-Ne laser of wavelength 11.5×10^(-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 the He-Ne laser.