Физика -physics

Физик катталик - physical quantity physical quantity is a physical property of a phenomenon, body, or substance that can be quantified by measurement.

	Ўқувчи - pupil is a Hole Located in the center of the Iris of the eye That Allows Light to enter the Retina .Because It Appears Black Most of the Light Entering the pupil is absorbed by the Tissues Inside the eye. In humans the pupil is Round, BUT other species, such as some cats, Pupils Have slit. In optical terms, the Anatomical pupil is the eye's aperture and the Iris is the aperture Stop.