For the travelling harmonic wave `y(x, t) = 2.0 cos 2pi (10 t - 0.0080 x + 0.35)`, where x and y are in cm and t in s. Calculate the phase difference between oscillatory motion of two points separated by a distance of
(a) 4m
(b) 0.5 m
(c) `lambda//2`
(d) `(3 lambda)/(4)`

Explanation

To solve the problem, we need to calculate the phase difference between two points separated by a given distance for the wave described by the equation:

\[ y(x, t) = 2.0 \cos(2\pi(10t - 0.0080x + 0.35)) \]

### Step 1: Identify the wave parameters

From the wave equation, we can identify the following parameters:
- The angular frequency \( \omega = 2\pi \times 10 \) rad/s.
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