The length of a vertical pole at the surface of a lake of water `(mu=4/3)` is 24 cm. Then to an under-water fish just below the water surface the tip of the pole appeard to be

Temperature of water at the surface of lake is - 20^(@)C . Then temperature of water just below the lower surface of ice layer is

Temperature of water at the surface of lake is – 20°C. Then temperature of water just below the lower surface of ice layer is

A bird is flying 3m above the surface of water. To a fish underwater, the height of the bird from the water surface appears to be

A fish looking up through the water sees the outside world, contained in a circular horizon. If the refractive index of water is 4/3 and the fish is 12 cm below the water surface, the radius of this circle (in cm) is .....

A bird in air looks at a fish vertically below it and inside water. h_(1) is the height of the bird above the surface of water and h_(2) , the depth of the fish below the surface of water. If refractive index of water with respect to air be mu , then the distance of the fish as observed by the bird is

A fish is a little away below the surface of a lake. If the critical angle is 49^(@) , then the fish could see things above the water surface withing an angular range of theta^(@) where