A convex lens of focal length 30 cm is placed between a screen and a square plate of area `4cm^(2)`. The image of the plate formed on the screen is `16cm^(2)`. Calculate the distance between the plate and the screen.

A convex lens of focal length 20 cm is placed at a distance of 30 cm from a screen. Where should an object be placed so as to form its real image on the screen?

A lens with a focal length of f=30 cm produces on a screen a sharp image of an object that is at a distance of a=40 cm from the lens. A plane parallel plate with thickness of d=9 cm is placed between the lens and the object perpendicular to the optical axis of the lens. Through what distance should the screen be shifted for the image of the object to remain distinct? The refractive index of the glass of the plate is mu=1.8.

A lens with a focal length of f=30 cm produces on a screen a sharp image of an object that is at a distance of a=40 cm from the lens. A plane parallel plate with thickness of d=9 cm is placed between the lens and the object perpendicular to the optical axis of the lens. Through what distance should the screen be shifted for the image of the object to remain distinct? The refractive index of the glass of the plate is mu=1.8.

A convex lens of focal length 20 cm is placed at a distance 5 cm from a glass plate (mu = (3)/(2)) of thickness 3 cm. an object is placed at a distance 30 cm from lens on the other side of glass plate. Locate the final image produced by this optical setup.

A convex lens forms an image of an object on a screen ,The height of the image is 9cm The lens is now disiplaced between the object on the screen.the height of this image is 4cm .the distance between the object and the screen is 90cm