A small fish, 0.4m below the surface of a lake, is viewed through a simple converging lens of focal length 3m. The lens in kept at 0.2m above the water surface such that the fish lies on the optical axis of the lens. Find the image of the fish seen by the observer. The refractive index of water is `4//3`.

A small fish 0.4 m below the surface of a lake is viewed through a simple converging lens of focal length 3 m.the lens is kep at 0.2 m above the water surface such that the fish lies on the optical axis of the lens. Find the image of the fish seen by the observed. (mu_(water)=(4)/(3))

A small fish 0.4m below the surface of a lake, is viewed through a simple converging lens of focal length 3m . The lens is kept at 0.2m above the water surface such that the fish lies on the optical axis of the lens. Find the distance of the image of the fish from the lens as seen by the observer. The refractive index of water is 4//3 .

A biconvex lens has focal length (2)/(3) times the radius of curvature of either surface. Calculate refraction index f material of the lens.

The focal length of a lens is -0.4m. The lens is

A convergent beam of light passes through a diverging lens of focal length 0.2m and comes to focus at a distance of 0.3m behind the lens. Find the position of the point at which the beam would converge in the absence of the lens.

An object is at a distance of 20 m form a convex lens of focal length 0.3m The lens forms an image of the object moves away form the lens at a speed of 5m//s the speed and direction of the image will be :

A convergent beam of light passes through a diverging lens of focal length 0.2 m and comes to focus at a distance of 0.3 m behind the lens. Find the position of the point at which the beam would converge in the absence of the lens.

A fish in a lake (refractive index 4//3 for water ) is viewed through a convex lens. From water surface, the lens is placed in air at half of the distance of the fish from the water surface, so that the image is formed at the fish itself. The focal length of the lens is how many times the depth of fish in water?

A fish lies at the bottom of a 4 m deep water lake. A bird flies 6m above the water surface and refractive index of water is 4//3 . Then the distance between