In the experiment of interference of light, the optical paths at a point differ by `73.5` times the wavelenth of blue light of `4400Å` . The nature of

Question

In the experiment of interference of light, the optical paths at a point differ by `73.5` times the wavelenth of blue light of `4400Å` . The nature of

In the experiment of interference of light, the optical paths at a point differ by `73.5` times the wavelenth of blue light of `4400Å` . The nature of the illumination at the same of point using red light of wavelength `6000Å` will be
A. bright
B. dark
C. neither bright nor bark
D. none of these

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
Path diff. `n_(b) lambda_(b)=n_(1) lambda_(r)`
`=73.5xx4.4xx10^(-7)`
`=(323.4xx10^(-7))/(6xx10^(-7)) =53.9`
Since, path diff. `=53.9 lambda`, which is not equal to integral multiple of wavelenght or odd multiple of haf of wavelenght thus, given point is neither, bright nor dark.

4 views Answered 2023-02-05 15:29