CBSE Book Class 8 Science Activity Make A Periscope

LIGHT

James is very excited today. He is at the dockyard where his father works. His father had promised him to show the ships and submarine, if James stood first in class for his final exam. James did not know of the surprise that was waiting for him. His father had taken special permission to allow both of them to see the interiors  of  a  submarine.  James  could  not  help  but  shriek  in  excitement  when  his  father  took  him underwater inside a submarine. 

'I don't feel as if I am under the water surface, said James.'Come, have a look at this, said father pointing to an instrument. James looked through it and was delighted to see the objects above water. He could not believe his eyes.  He could see the land around. He could see people walking around in the dockyard. I know this is a  periscope, said James, who had read about it in books.  Seeing James so excited, father promised him that he will help make a periscope of his own. When they got back home, both James and his father got down to making a  periscope So, roll up your sleeves, and get going!! Make your own periscope. 

Please refer to the link below - CBSE Class 8 Science Activity Make A Periscope