The discussion focuses on calculating the height of an RC glider based on ground and air measurements. The glider measures 2200 mm on the ground and appears to measure 35 mm in the air. The height can be calculated using the formula \( h = \frac{1200}{35}d \), where \( d \) is the distance from the observer's eye. Accurate height estimation requires both the apparent size and the distance from the observer, emphasizing the importance of perspective in visual measurements.
PREREQUISITESAnyone interested in physics, particularly those studying optics and measurement techniques, as well as hobbyists working with RC gliders and model aircraft.
cloned33 said:
No, the height depends on what distance from the eye the image of the glider measures 35 mm. If you hold a ruler in a stretched hand and the glider seems to measure 35 mm, that's quite different from when hold the ruler right next to your eye. So, 35 mm alone is not a meaningful measurement, you also need to add the distance $d$ from the eye so that that 35 mm at this distance seems like 1200 mm at real distance $h$.cloned33 said:
Ackbach said:
