Question

In Young's experiment, what will be the phase difference and the path difference between the light waves reaching i) the third bright fringe and ii) the third dark fringe from the centre of fringe ? $(\lambda =6000\mathring{A})$

• A. i) $16\pi 18000\mathring{A}$
  ii) $5\pi 15000\mathring{A}$
• B. i) $6\pi 18000\mathring{A}$
  ii) $5\pi 15000\mathring{A}$
• C. i) $6\pi 18000\mathring{A}$
  ii) $15\pi 15000\mathring{A}$
• D. i) $60\pi 18000\mathring{A}$
  ii) $50\pi 15000\mathring{A}$

Answer 1

The correct option is B i) $6\pi 18000\mathring{A}$

ii) $5\pi 15000\mathring{A}$