A wavelength of light `5600Å` produces 60 fringes. What will be the number of fringes produced at same distance if wavelength of light used is `4800Å`

Question

A wavelength of light `5600Å` produces 60 fringes. What will be the number of fringes produced at same distance if wavelength of light used is `4800Å`

A wavelength of light `5600Å` produces 60 fringes. What will be the number of fringes produced at same distance if wavelength of light used is `4800Å`?
A. 51
B. 70
C. 60
D. 45

Monjur Alahi

8 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 - B
`lambda_(1)5600, n_(1) 60 n_(2) = ?`
For `lambda_(2)=4800Å`
For same path difference,
`n_(1) lambda_(1)= n_(2) lambda_(2)`
`:.n_(2)=(n_(1) lambda_(1))/(lambda_(2)) =(60xx5600)/(4800) =70`

8 views Answered 2023-02-05 15:29