In a biprism experimentn is performed yellow light of wavelength `5600Å`. The yellow light was then replaced by red light of wavelengts `6400Å`. Find

Question

In a biprism experimentn is performed yellow light of wavelength `5600Å`. The yellow light was then replaced by red light of wavelengts `6400Å`. Find

In a biprism experimentn is performed yellow light of wavelength `5600Å`. The yellow light was then replaced by red light of wavelengts `6400Å`. Find the value of n for which `(n+1)^(th)` yellow bright band consider with the `n^(th)` red bright band for the same setting.
A. 4
B. 5
C. 6
D. 7

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 - D
`x_((n+1))` for yellow `=x_(n)` for red
`rArr (D)/(d) (n+1)lambda_(y)= (D)/(d) n lambda_(r)`
`:. N= (lambda_(y))/(lambda_(r)- lambda_(y))`
`=(5600)/(64000-5600)=7`

4 views Answered 2023-02-05 15:29