Question

if two sources have a randomly varying phase difference x(t) , the resultant intensity willbe given by
1) I
2) I/2
3) 2I
4) I/(2)1/2

Answer 1

2l is the answer........

Answer 2

Answer:

3) 2l - intensity of resultant waves is sum of  intensity of individual wave.

Explanation:

Since two sources have a randomly varying phase difference , waves are incoherent. In case of incoherent waves, intensity of resultant waves is sum of  intensity of individual wave.

Hence the resultant wave is l + l = 2l