See Also: Aperture problem(health)
Aperture(medicine)
aperture(dictionary)
aperture(dictionary)
contra-aperture(medicine)
angle of aperture(medicine)
angular aperture(medicine)
aperture, angular(medicine)
aperture, effective(medicine)
aperture correction(medicine)

Aperture problem (health)


Any motion detecting device with a field of view which is small relative to an edge moving through it can only detect the component of velocity at right angles to the edge, while the component parallel to the edge is invisible.