1.

An object is placed at a distance of 30 cm. from a concave lense of focal length 15 cm list four characteristics (nature , position etc.) of the image formed by the lens

Answer»

U=-30cm f= -15cm 1/f=1/v-1/u1/v=1/f+1/uon substituting v=-10cmm=v/um=-10/-30m=1/3=.33so the magnification is positive so it is a virtual erect image .m isless than 1 so the image is diminished .and v is negative so the image is formed on the same side of the lens



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