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In a Young's interference experimental arrangement incident yellow light is composed of two wavelength 5890 \AA and 5895 \AA. between the slits is 1 \mathrm{~mm} and the screen is placed 1 \mathrm{~m} away. Order upto which fringes can be seen on the screen will be

Option: 1

384


Option: 2

 486


Option: 3

 512


Option: 4

 589


Answers (1)

best_answer

\mathrm{n} \lambda_{2}=\left(n+\frac{1}{2}\right) \lambda_{1} \text { or } \frac{\left(\mathrm{n}+\frac{1}{2}\right)}{\mathrm{n}}=\frac{\lambda_{2}}{\lambda_{1}}

\text { or } \frac{1}{2 n}=\frac{\lambda_{2}-\lambda_{1}}{\lambda_{1}}=\frac{5895-5890}{5890}=\frac{5}{5890}

\therefore \mathrm{n}=\frac{5890}{10}=589

Posted by

Ritika Harsh

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