What is the phase difference between any two points on a spherical wavefront?

Options

A. 1 mm
B. 1 cm
C. 10 cm
D. 1 m

Answer

C

Explanation

`lambda=(v)/(f)=(300)/(500)=(3)/(5)`
`Deltaphi=(2pi)/(lambda)xxDeltax`
`Deltax` = path difference `=(lambda)/(2pi)xx(pi)/(3)=(3)/(5)xx(1)/(6)=10cm`.