A plane harmonic wave of frequency 440 Hz propagates in a medium in a direction that makes angle `60^(@)C` with x-axis as well as y-axis, find the phase difference between the oscillation at the point of medium whose coordinates are (1,1,2) and (2,3,1). the velocity of the wave in the medium is 220m/s.

Explanation

To find the phase difference between the oscillations at the points (1, 1, 2) and (2, 3, 1) for a plane harmonic wave, we will follow these steps:

### Step 1: Calculate the wavelength (λ)
The wavelength can be calculated using the formula:
\[ \lambda = \frac{V}{f} \]
Where:
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