De Broglie's wavelength is the wavelength associated with a massive particle,hypothesized by De Broglie that explains Bohr's quantised orbits by bringing in the wave-particle duality. It is written as λ=mvh (de broglie wavelength)
definition
Heisenberg uncertainty principle
The position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision. ΔxΔp>2ℏ ΔEΔt>2ℏ
formula
Uncertainty in position or momentum
ΔxΔp>2ℏ where Δx is the uncertainty in position, Δp is the uncertainty in momentum and ℏ is the reduced Planck's constant
example
Mass of a particle using de-Broglie wavelength
The de-Broglie wavelength associated with a particle moving with a velocity of 102 m/s is 6.6×10−24m.Then the mass of the particle is λ=mvh ⇒m=υλh=6.6×10−24×1026.6×10−34=10−12kg