Two thin similar convex glass are joined together front to front, with its rear portion silvered such that a sharp image is formed `0.2m` for an object at infinity. When the air between the glass pieces is replaced by water `(mu=4/3),` find the position of image.

Two thin similar convex glass pieces are joined together front to front with its rear portion silvered such that a sharp image is formed 20 cm from the mirror. When the air between the glass pieces is replaced by water (mu_(w)=4//3) , then the image formed from the mirror is at a distance of

Two thin similar watch glass pieces are joined together,front to front ,with rear convex portion silvered and the combination of glass pieces is placed at a distance a=60cm from a screen.A small object is placed normal to the optical axis of the combination such that its image is two time the object. Now water is filled in between the glass. water mu=4//3 ,calculated the distance through,which the object must be displayed so that a sharp image is again formed on the screen.

Two thin similar watch glass pieces are joined together,front to front ,with near convex portion silvered and the combination of glass pieces is placed at a distance a=60cm from a screen.A small object is placed normal to the optical axis of the combination such that its image is two time the object. Now water is filled in between the glass. water mu=4//3 ,calculated the distance through,which the object must be displayed so that a sharp image is again formed on the screen.

Two thin similar watch glass pieces are joimed together,front to front ,woth near convex portion silvered and the combination of glass pieces is placed at a distanc e a=60cm from a screen.A small object is placed normal to the optical axis of the combination such that its two water mu=4//3 ,calcuated the distance through,which the object must eb displayed so that a sharp image is again formed on the screen.

A small object is placed 20 cm in front of a block of glass 10 cm thick and its farther side silvered. The image is formed 22 cm behind the silvered face. Find the refractive index of glass.

A small object is placed 20 cm in front of a block of glass 10 cm thick and its farther side silvered. The image is formed 22 cm behind the silvered face. Find the refractive index of glass.

A thin lens, made of glass of refractive index 3//2, produces a real and magnified image of an object in air. If the whole system, maintaing the same distance between the object and the lens, is immersed in water (RI=4//3), then the image formed will be

A thin lens, made of glass of refractive index 3//2, produces a real and magnified image of an object in air. If the whole system, maintaing the same distance between the object and the lens, is immersed in water (RI=4//3), then the image formed will be

A thin converging lens is placed between an object and a screen whose position are fixed. There are two positions of the lens at which the sharp image of the object is formed on the screen. Find the transverse dimension of the object if at one position of the lens the image dimension equal h' = 2.0 mm and at the other, h'' = 4.5 mm .

An object is placed 20cm in front of a block of glass 10cm thick having its farther side silvered. The image is formed 23.2cm behind the silvered face. The refractive index of glass is