The variation of 'g' with altitude is: \\\\(g' = g(1- \\dfrac{2h}{R})\\\\)The variation of 'g' with depth is: \\\\(g' = g(1- \\dfrac{d}{R})\\\\)So, from the above equations we can deduce that if a person goes deep into a mine or to a height above the Earth's surface, the gravitational field decreases at different rates.