Two light beams of intensities 4 I and 9 I interfere on a screen. The phase difference between these beams on the screen at point A is zero and at point B is π . The difference of resultant intensities, at the point A and B , will be _

Question

Two light beams of intensities 4 I and 9 I interfere on a screen. The phase difference between these beams on the screen at point A is zero and at point B is &#960; . The difference of resultant intensities, at the point A and B , will be _____ I .

Quantrex Academy · Accepted Answer

Correct answer: 0

The resultant intensity is given by I net &#160; = I 1 + I 2 + 2 I 1 I 2 cos &#981; Now, for I max , phase angle is &#981; = 0 and for I min , phase angle is &#981; = &#960; . Thus, I max = I 1 + I 2 2 = 9 I + 4 I 2 = 25 I And I min = I 1 - I 2 2 = 9 I - 4 I 2 = I The difference of resultant intensities is I max - I min = 25 I - I = 24 I

Two light beams of intensities 4 I and 9 I interfere on a screen. The phase difference between these beams on the screen at point A is zero and at point B is π . The difference of resultant intensities, at the point A and B , will be _____ I .

Correct answer

Step-by-step solution

More from Waves and Sound

Two light beams of intensities 4 I and 9 I interfere on a screen. The phase difference between these beams on the screen at point A is zero and at point B is &#960; . The difference of resultant intensities, at the point A and B , will be _____ I .

Correct answer

Step-by-step solution

More from Waves and Sound

Two light beams of intensities 4 I and 9 I interfere on a screen. The phase difference between these beams on the screen at point A is zero and at point B is π . The difference of resultant intensities, at the point A and B , will be _____ I .