Homework Statement
A periscope is made of two good mirrors. Find the ratio of the minimum widths of the mirrors if the distance between them is L and the distance from the lower mirror to the eye of the observer is l.The objects viewed through the periscope are at a great distance from it...
An electron doesn't move in an orbit round the nucleus. It is in a diffused state.
Please explain what is the meaning of this statement and what is diffused state.