Question

Two coherent sources of wavelength $6.2\times {10}^{-7}$m produce interference. The path difference corresponding to ${10}^{th}$ order maximum will be?

• A. $6.2\times {10}^{-6}$m
• B. $3.1\times {10}^{-6}$m
• C. $1.5\times {10}^{-6}$m
• D. $12.4\times {10}^{-6}$m

Answer 1

The correct option is A $6.2\times {10}^{-6}$m

for $m^{th}$ order maximum path difference

$=n\lambda =10\times 6.2\times {10}^{-7}m=6.2\times {10}^{-6}m$

Option is A