Why does the water in a clear pond forms image of bird standing it?

When light from the bird strikes the surface of the pond, some of the light is reflected and some is refracted. The refracted light bends as it enters the water and then again as it exits the water. This bending of light causes the bird to appear to be in a different location than it actually is. The image of the bird is formed by the light rays that are reflected from the surface of the water. The reflected light rays travel in a straight line from the bird to the observer's eye. The observer's brain then interprets these light rays as coming from the image of the bird, which appears to be located below the surface of the water.

In order for the image of the bird to be clear, the water in the pond must be clear. If the water is murky or cloudy, the light rays will be scattered and the image of the bird will be blurry. The depth of the water also plays a role in the clarity of the image. The shallower the water, the clearer the image will be.