A parallel beam of light passes parallel to the principal axis and falls on one face of a thin convex lens offocal length f and after two internal reflections from the second face forms a real image. The distance of image from lens if the reflactive index of material of lens is `1.5` :

A ray of light coming parallel to the principal axis after passing through a convex lens, passes through its

A convex lens of focal length 16 cm forms a real image double the size of the object. The image distance of the object from the lens is

A parallel beam of light falls successively on a thin convex lens of focal length 40 cm and then ono a thin convex lens of focal length 10cm as shown in figure. In figure, the second lens is an equi-concave lens of focal length 10cm and made of a material of refractive index 1.5. In both the cases, the second lens has an aperture equal to 1cm. Q. Compare the area illuminated by the beam of light on the screen, which passes through the second lens in the two cases. The ratio (A_(2)//A_(1)) will be

A convex lens of focal length 16 cm forms a real image double the size of the object. The distance of the object from the lens is