TRANSVERSE MAGNIFICATION

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Magnification positive : Erect image :: Magnification negative : ………….

Magnification From Convex Mirror

When an small object is placed at a distance x_(1) and x_(2) from a lens on its principal axis, then real image and a virtual image are formed respectively having same magnitude of transverse magnification. Then the focal length of the lens is :

When an small object is placed at a distance x_(1) and x_(2) from a lens on its principal axis, then real image and a virtual image are formed respectively having same magnitude of transverse magnification. Then the focal length of the lens is :

An object is placed in front of convex surface of a glass plano-convex lens of thickness d = 9.0 cm . The image of that object is formed on the plane surface of the lens serving as a screen. Find: (a) the transverse magnification if the curvature radius of the lens's convex surface is R = 2.5 cm , (b) the image illuminance if the luminance of the object i s L = 7700 cd//m^(2) and the entrance apertune diameter of the lens is D = 5.0 mm , losses of light are negligible.