Question

a body vibrating with a time period of 2 milli seconds produces a wave travelling in a medium with a velocity of 1250 m/s . what is the wave length ?

Answer 1

given, Time period, T=2×10−3sT=2×10−3s

Velocity of wave produced , v=1250m s−1v=1250m s−1

Wavelength,  λ=wave velocity frequency=wave velocity×time period λ=wave velocity frequency=wave velocity×time period

⟹λ=1250∗2∗10−3=2.5m

Answer 2

time period(t) = 2 milliseconds = 2×10^(-3) s

speed of wave(s) = 1250 m/s

wavelength (w) = ?

we know that speed = w/t

=> w = s × t

=> w = 1250 × (2 × 10^(-3)) = 1250 × 2 × 10^(-3) = 2500 × 10^(-3) = 2.5 m

Thus wavelength is 2.5m