A convex lens focusses ab object 10 cm from it on a screen paced 10 cm away from it. A goes plate `(mu=1.5)` of thickenss 1.5 cm is inserted between tehlens and the screen. Where should the object be placed so that its image is again focussed on the screen?

A convex lens focusses an object 10 cm from it on a screen placed 10 cm away from it. A glass plate (mu=1.5) of thickenss 1.5 cm is inserted between the lens and the screen. Where should the object be placed so that its image is again focussed on the screen?

A convex lens focusses an object 10 cm from it on a screen placed 10 cm away from it. A glass plate (mu=1.5) of thickenss 1.5 cm is inserted between the lens and the screen. Where should the object be placed so that its image is again focussed on the screen?

A convex lens focuses an object 40cm from it on a screen placed 10cm away from it. A glass plate ( mu=1.5 ) and of thickness 3cm is inserted between the lens and the screen. Where should the object be placed so that its image is again focused on 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 is made of three thin different mediums. Radius of curvature and refractive index of each medium is shown iin Figure., Surface AB is straight. An object is placed at some distance from the lens by which a real image is formed on the screen placed at a distance of 10cm from the lens. Find a. The distance of the object from the lens. b. A slab of thiskness 1.5cm and refractive index 1.5 is introduced between the image and the lens. Find the new position of the object so that image is again formed on the screen. c. Find the position of the image when same slabe is placed on the other side of the lens {as in part (b)}

A convex lens forms an image of an object on a screen 30 cm from the lens. When the lens is moved 90 cm towards the object, then the image is again formed on the screen. Then, the focal length of the lens is

A convex lens forms an image of an object on a screen 30 cm from the lens. When the lens is moved 90 cm towards the object, then the image is again formed on the screen. Then, the focal length of the lens is

A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?

A thin converging lens of focal length f=25.0 cm forms the image of an object,on the screen,at a distance 5m from the lens. The screen is then drawn closer by a distance of 18cm. By what distance should the object be shifted so that its image on the screen is sharp again?