I have used the word object but I'd be referring to particles as in the context, the objects would be comparatively very small.
Consider the de Broglie's equation: $$ \lambda = \frac{h}{mv} \implies v = \frac{h}{m\lambda}$$
A particle having zero initial velocity would require an impulse of $mv$ to get the required velocity.
According to Newton's law of gravitation:
$$ F = \frac{G Mm}{r^2} $$
To get the required impulse, we can have the Gravitational force work for a short interval of time $t$ i.e. $$J = \frac{GMm t }{r^2} $$
To get the required $\lambda$ for the particle :
$$mv = J$$
$$\implies \frac{h}{\lambda} = \frac{GMmt}{r^2}$$
$$\implies r= \sqrt\frac{GMmt\lambda}{h} $$
For $M=1$Kg, $m = 1$Kg, $t = 1$s, $\lambda = 650$nm
$r$ comes out to be $2.56 \times 10^{8} $ m
So, at the the given conditions would the wave nature dominate to a mass of 1 Kg ?
What would be the consequences ? Would everyday objects behave like a wave ? Would our perception of massive objects change ?
EDIT:
The question was marked duplicate of Validity of naively computing the de Broglie wavelength of a macroscopic object which it certainly is not.
This question is about the consequences of a massive object (Such as a human being) behaving like a wave of a significant wavelength unlike the mentioned question which asks the validity of de Broglie equation on non-fundamental (many-body) object.
