Question

If n coherent sources of intensity $ \frac{{{p}^{2}}{{t}^{2}}}{m} $ are superimposed at a point the intensity of the point is

• A. $ \frac{{{p}^{2}}{{t}^{2}}}{2m} $
• B. $ \frac{{{p}^{2}}{{t}^{2}}}{3m} $
• C. $ \frac{pt}{2m} $
• D. $ \frac{2m{{L}^{2}}}{3} $

Answer 1

Answer: (B)

The resultant amplitude is $ A=x{{a}_{0}} $ $ l\propto {{A}^{2}} $ $ l=k{{A}^{2}}=k{{x}^{2}}a_{0}^{2}={{x}^{2}}{{l}_{0}} $