364808 A convex lens forms a real image \(9\;cm\) long on a screen. Without altering the position of the object and the screen, the lens is displaced and we get again a real image \(4\;cm\) long on the screen. Then the length of the object is-

364809 A candle placed \(25\;cm\) from a lens forms an image on a screen placed \(75\;cm\) on the other side of the lens. The focal length and type of the lens should be

364810 A convex lens produces a real image \(m\) times the size of the object. What will be the object distance from the lens?

364811 A thin lens has focal length, \(f\) and its aperture has diametert forms an image of intensity \(I\). Now the central part of the aperture upto diameter \(\frac{d}{2}\) is blocked by an opaque paper. The focal length and image intensity will change to

364808 A convex lens forms a real image \(9\;cm\) long on a screen. Without altering the position of the object and the screen, the lens is displaced and we get again a real image \(4\;cm\) long on the screen. Then the length of the object is-

364809 A candle placed \(25\;cm\) from a lens forms an image on a screen placed \(75\;cm\) on the other side of the lens. The focal length and type of the lens should be

364810 A convex lens produces a real image \(m\) times the size of the object. What will be the object distance from the lens?

364811 A thin lens has focal length, \(f\) and its aperture has diametert forms an image of intensity \(I\). Now the central part of the aperture upto diameter \(\frac{d}{2}\) is blocked by an opaque paper. The focal length and image intensity will change to

364808 A convex lens forms a real image \(9\;cm\) long on a screen. Without altering the position of the object and the screen, the lens is displaced and we get again a real image \(4\;cm\) long on the screen. Then the length of the object is-

364809 A candle placed \(25\;cm\) from a lens forms an image on a screen placed \(75\;cm\) on the other side of the lens. The focal length and type of the lens should be

364810 A convex lens produces a real image \(m\) times the size of the object. What will be the object distance from the lens?

364811 A thin lens has focal length, \(f\) and its aperture has diametert forms an image of intensity \(I\). Now the central part of the aperture upto diameter \(\frac{d}{2}\) is blocked by an opaque paper. The focal length and image intensity will change to

364808 A convex lens forms a real image \(9\;cm\) long on a screen. Without altering the position of the object and the screen, the lens is displaced and we get again a real image \(4\;cm\) long on the screen. Then the length of the object is-

364809 A candle placed \(25\;cm\) from a lens forms an image on a screen placed \(75\;cm\) on the other side of the lens. The focal length and type of the lens should be

364810 A convex lens produces a real image \(m\) times the size of the object. What will be the object distance from the lens?

364811 A thin lens has focal length, \(f\) and its aperture has diametert forms an image of intensity \(I\). Now the central part of the aperture upto diameter \(\frac{d}{2}\) is blocked by an opaque paper. The focal length and image intensity will change to