Mechanical waves

$$v = \frac{\lambda}{T}$$

v - speed (velocity)
λ - wave length
T - period

Find It is known that:

$$v = \lambda\cdot \nu$$

v - speed (velocity)
λ - wave length
ν - frequency

Find It is known that:

Wave transition to another environment

$$\frac{\lambda_1}{\lambda_2} = \frac{v_1}{v_2}$$

v1, v2 - speeds
λ1, λ2 - wave lengths

Find It is known that:

Calculate 'λ1'

Interference maximum and path difference

$$\Delta_{d} = k\cdot \lambda$$

Δd - path difference
λ - wave length

Find It is known that:

Calculate 'Δ_d'

Interference minimum and path difference

$$\Delta_{d} = \frac{(2\cdot k+1)\cdot \lambda}{2}$$

Δd - path difference
λ - wave length

Find It is known that:

Calculate 'Δ_d'