What is a periscope

L.I: To understand how a periscope works.

For the second inquiry task we worked with the same people as the first one but in this task we needed to explain what a periscope was. We did this task because Mr Johnston came to our class and told us some information about periscopes.Mr Johnston told us that  the angle of incidence equals the angle of reflection, and that means that when light hits a mirror at a 45 degree angle and then reflects, as that same light reflects back on another mirror at a 45 degree angle. This task was fun to complete.