hf = Q*V + Φ

Φ = work function (min energy)

h= planck's constant

v = stopping voltage

q = charge of electron

Λ = ( h/p ) = ( h/ m*v )

Λ = wavelength

h = planck's constant

p = momentum

m = mass

v = velocity

p = h / Λ

p = momentum

h = planck's constant

Λ = wavelength

e = mc2 

e = energy

m = mass

c = speed of light

e = h*f = p*c

e= energy

h= planck's constant

f = frequency

p = momentm

c = speed of light

V = W / q

W = work (also Φ )

q = charge

c = f*Λ

c= speed of light

f = fequency

Λ = wave length