i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane. ii) The ratio of sine of angle of incidence to the sine of angle of refraction is a constant. This law is also called Snell’s law.
Object position Image positionImage sizeNature of image At InfinityAt F 2 DiminishedReal & Inverted Behind 2F 1 B/W F 2 &2f 2 SmallReal & Inverted At 2f 1 At 2F2SameReal & Inverted Between F And 2F Beyond 2F 2 MagnifiedReal & Inverted At F1At InfinityHighly Magnified Real & Inverted B/W The Pole (P) And F 1 Same Side Of Lens MagnifiedVirtual And Erect
Object position Image position Image sizeNature of image At InfinityAt F 1 DiminishedVirtual And Erect B/W O & Infinity Between O And F 1 SmallVirtual And Erect