focusing power

the degree to which a converging lens causes parallel rays of light to be refracted (see refraction). A high focusing power will cause light to be focused to a point close to the lens; a low focusing power causes the light to be focused farther from the lens. The focusing power of a lens is measured in diopters. The magnification power of a lens indicates how many times an object is enlarged when viewed through the lens; for example, a 4× lens will produce an image four times the actual size of the object.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

May 9th 2024

effective dose (ED)

Sorry, "effective-dose-ed" is not in the Dictionary of Psychology. Please report to APA if you believe this is an error.