If n coherent sources of intensity (p2t2/m) are superimposed at a point the intensity of the point is

Question

If n coherent sources of intensity (p2t2/m) are superimposed at a point the intensity of the point is (A)  (p2t2/2m)  (B)  (p2t2/3m)  (C)  (pt/2m)  (D)  (2mL2/3)

Tardigrade Admin · Accepted Answer

The resultant amplitude is A=xa0 l propto A2 l=kA2=kx2a02=x2l0

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

$\frac{p ^{2} t ^{2}}{2 m}$

$\frac{p ^{2} t ^{2}}{3 m}$

$\frac{pt}{2 m}$

$\frac{2 m L ^{2}}{3}$

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

Q. If n coherent sources of intensity mp2t2​ are superimposed at a point the intensity of the point is

2mp2t2​

3mp2t2​

2mpt​

32mL2​