A progressive wave has a wavelength of 50cm. calculate the phase difference between two points at a distance of 20cm apart.
Answer Details
The phase difference between two points on a wave is given by the equation:
Δφ = 2π(Δx / λ)
where Δx is the distance between the two points and λ is the wavelength of the wave.
In this question, the wavelength is given as 50 cm and the distance between the two points is 20 cm. Therefore, substituting these values into the equation gives:
Δφ = 2π(20 / 50) = π/5
Therefore, the phase difference between the two points is π/5.
So the correct answer is: 4/5 π