Question

A 0.66 kg ball is moving with speed of 100m/s the associated wavelenght will be

Answer 1

According to the de broglie like radiation (waves) behave like particles
Particles also behave like waves . And he gave a formula. λ = h/p or λ = h/mv
were ,

h -------> Planck's constant
p --------> momentum of an object
m -------> mass of object
v ---------> velocity of an object.

Then why we do not see heavy object like ball behave like waves because
λ is universally proportional to m and v means if mass increase then wavelength is decrease if mass decreases then λ increase so we see this behavior in electron like particles .
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h = 6.626 × 10^-34Js
m = 0.66kg = 66 × 10²Kg
v = 100m/s
λ = ?

λ = h/p

λ = h/mv

λ = 6.626×10^-34/66×10²×10²

λ = 6.626×10^-34/66×10⁴

λ = 0.10039 × 10^-34-4

λ = 0.10039 × 10^-38

λ = 1.0039 × 10^-39m

so associated wavelength = λ = 1.0039 × 10^-39m