In a biprism experiment using sodium light = 6000 , Å an interfer… - Vidyadip

MCQ

In a biprism experiment using sodium light $\lambda = 6000\, Å$ an interference pattern is obtained in which $20$ fringes occupy $2\, cm$. On replacing sodium light by another source of wavelength $\lambda_2$ without making any other change $30$ fringes occupy $2.7\, cm$ on the screen. What is the value of $\lambda_2$?.......$\mathop A\limits^o $

A
$4500$
✓
$5400$
C
$5600$
D
$4200$

✓

Answer

Correct option: B.

$5400$

b

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