Questions

It is a scheme across the river Rihand near Pipri in Mirzapur district of Uttar Pradesh

Ten kids will get each one apple. The eleventh kid will get the apple with the bowl.

A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to reflect images through a tube.

Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube. At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer’s eye.

Hence, A periscope works by the principle of Total internal reflection.

A book has a spine to hold all the pages, but it has no bones.