WAEC - Physics (1997 - No. 35)
A progressive wave has a wavelength of 50cm. calculate the phase difference between two points at a distance of 20cm apart.
10/3π
5/2 π
4/5 π
2/3 π
π/3
Giải thích
Phase difference = \(\frac{2\pi x}{\lambda}\)
= \(\frac{2\pi \times 20}{50}\)
= \(\frac{4}{5} \pi\)