Question

If \[v\] is the speed of the wave and \[\tau\] is the time taken by the wavefront to advance from B to C, what is the distance BC?

Options

• \[BC=v\tau\]

• \[BC=v/\tau\]

• \[BC=\tau/v\]

• \[BC=v+\tau\]

Answer 1

Distance travelled equals speed multiplied by time. The wavefront advances from B to C in time \[\tau\], so \[BC=v\tau\].