Explain the effect of Boyle's Law.

(N/A) Boyle's Law states that for a fixed amount of an ideal gas kept at a fixed temperature,pressure $(P)$ and volume $(V)$ are inversely proportional,i.e.,$P \propto \frac{1}{V}$ or $PV = k$.
$1$. If the pressure of a gas is doubled,its volume becomes half of the original volume.
$2$. Gases are highly compressible because,when pressure increases,the same number of gas molecules are forced into a smaller space.
$3$. As the volume decreases due to increased pressure,the density of the gas increases,making the gas appear 'thicker' or more concentrated.