Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Wave Optics
0 votes

Two monochromatic coherent sources of wavelength 5000 A are placed along line normal to screen as shown. Find the order of central bright fringe if $d = 0.5mm$ and $D = 1m$

(A) 500 $\qquad$ (B) 4000 $\qquad$ (C) 1000 $\qquad$ (D) 2000

Can you answer this question?

1 Answer

0 votes
At the central maxima, $\theta = 0$.
At the central maxima, $\theta = 0, \therefore p = d = n\;\lambda$
$\Rightarrow n = \large\frac{d}{\lambda}$
$\Rightarrow n = \large\frac{0.5}{5\times10^{-3}}$$ = 1000$
answered Apr 19, 2014 by balaji.thirumalai
edited Apr 19, 2014 by balaji.thirumalai

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App