Question

Two waves whose intensity are same (1) move towardsa point P in same phase the resultant intensity at pointP will be:​

Answer 1

Answer:

Two waves whose intensity are same (I) move towards a point P in same phase the resultant intensity at point P will be 4I

Explanation:

As we know by the superposition of two waves

$I_R = I_1 + I_2 + 2\sqrt{I_1I_2}cos\phi$

we can use above superposition when two waves are propagating in same direction and having same frequency

This is known as interference of two waves

here we know

$I_1 = I_2 = I$

also we know

$\phi = 0$

so we have

$I_R = I + I + 2I cos0$

$I_R = 4I$

#Learn

Topic : Interference

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