The distance between an object and the s...

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

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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 ___________.

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 displacement method distance of object and screen is 100 cm initial image is obtained on screen. Now lens is displaced 40 cm image formed on screen again . If power of the lens is (100/N) dioptre, then find the value of N :

A divergent lens produces an image of magnification 0.5 when the object distance is 10 cm. The focal power of the lens (in diopters)

A convex lens of focal length f is placed somewhere in between an object and a screen. The distance between the object and the screen is x . If the numerical value of the magnification produced by the lens is m , then the focal lnegth oof the lens is .

A lens of focal length f is placed in between an object and screen at a distance D. The lens forms two real images of object on the screen for two of its differenct positions, a distance x apart. The two real images have magnifications m_(1) and m_(2) , respectivelly (m_(1)gtm_(2)) . Then,

An object placed at 20 cm from a lens, forms an image on a screen placed 60 cm on the other side of the lens. What is the focal length and type of the lens ?

The distance between the object and the screen is d (greater than 4 times the focal length of a convex lens). Real images of the object are obtained on the screen for two positions of the lens that are separated by distance x apart. The ratio of size of the images in the two positions of the lens are

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