Boyle's Law was founded by Sir Boyle (1627-1691) in the 1600's. This law describes how the volume of the gas and the pressure put on the gas are related. The more pressure on the gas the more the volume of the gas will decrease. This formula is crucial to scuba diving. Like every good Law this law has a formula. The formula is P1 x V1 = P2 x V2. This means that the first pressure exerted on the first volume is equal to the second pressure exerted on the second volume. If our scuba equipment did not change the pressure of the air we would not be able to breathe under water at great depths. When we go deeper into the water the air volume decreases and when you come up the air volume increases. This is why we never hold our breath, because if we hold it and come up the air volume will increase and our lungs will explode from the outward force of the air.


P1 x V1 = P2 x V2

Boyle's Law works only if the temperature is constant. This law works together with Charles' Law ("Charles' Law describes the connection between the temperature of a gas and the pressure exerted on the gas. Scuba divers breathe from a tank of air in a pressurized environment, so Charles' Law is a matter of survival for all divers.")

Inverse variation (one goes up while the other goes down)

Graphs can be found at

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