A progressive wave has a wavelength of 50cm. calculate the phase difference between two points at a distance of 20cm apart.
-
A.
10/3π -
B.
5/2 π -
C.
4/5 π -
D.
2/3 π -
E.
π/3
Correct Answer: Option C
Explanation
Phase difference = (frac{2pi x}{lambda})
= (frac{2pi times 20}{50})
= (frac{4}{5} pi)