What does a higher altitude correspond to in altimeter function?

A higher altitude corresponds to less squeezing of the aneroid wafers in the altimeter. The altimeter operates based on changes in atmospheric pressure, which decreases as altitude increases.

Inside the altimeter, there are aneroid wafers that expand and contract in response to the changes in atmospheric pressure. At higher altitudes, the outside air pressure is lower, which causes the aneroid wafers to expand more due to the lower atmospheric pressure acting on them. This expansion results in less squeezing, which causes the altimeter to indicate a higher altitude.

Understanding this relationship is crucial for pilots, as the altimeter reading is essential for maintaining proper altitude during flight. The mechanics of how atmospheric pressure interacts with the aneroid wafers underscore the principle that as one ascends to higher altitudes, the pressure drops and the waivers are less 'squeezed,' leading to the mechanical movement that reflects a change in altitude on the altimeter display.