The distance between an object and the screen is 100cm. A lens produces an image on the screen when the lens is placed at either of the positions 40cm apart. The power of the lens is nearly

The distance between an object and a screen is 100 cm. A lens can produce real image of the object on the screen for two different position between the screen and the object. The distance between these two positions is 40 cm. If the power of the lens is close to ((N)/(100))D where N is integer, the value of N is ___________.

The distance between an object and a screen is 100 cm. A lens can produce real image of the object on the screen for two different position between the screen and the object. The distance between these two positions is 40 cm. If the power of the lens is close to ((N)/(100))D where N is integer, the value of N is ___________.

The distance between an object and a screen is 3 metre. What is the power of a lens which can produce an image twice the size of the object when placed in between the lens and the screen.

In the displacement method the distance between the object and the screen is 70 cm and the focal length of the lens is 16 cm, find the seperation of the magnified and diminished image position of the lens.

In a displacement method the distance between the object and the screen is 70 cm and the focal length of the lens is 16 cm, find the separations of the magnified and diminished image position of the lens.

In a displacement method the distance between the object and the screen is 70 cm and the focal length of the lens is 16 cm, find the separations of the magnified and diminished image position of the lens.