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## Homework Statement

2 point sources 20cm apart produce 3 cm waves at a rate of 8 waves every 1.2 seconds

## Homework Equations

how many nodal lines are present

what is the angular deviation of the 3rd nodal line?

what is the angle between the 3rd nodal line and the 5th nodal line?

## The Attempt at a Solution

Answer for anyone who is wondering:

Nodal lines:

1 = (n-1/2) x wavelength

1 = (n-1/2) x 3

n = 7.17

Nodal Lines on both sides of right bisector, 7.17 x 2 = 14 (rounded down to nearest whole number)

Angular Deviation:

sinx = (n-1/2) x wavelength/d

x = sin-1(2.5 x (3/20))

x = 22 degrees

Angle between 3rd and 5th:

Repeat steps above to find angle of 5th nodal line and subtract angle of 4rd from angle of 5th

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