
Two mirrors in a horizontal tube can be turned individually to investigate reflection.
Activity.... Do – Think - Learn
Periscopes allow us to see objects that are out of our direct line of sight. Turn the mirrors so that you can see each other and not yourself.
At what angle do the mirrors need to be set? Each section is 5 degrees.
How and when are periscopes used?
How can you see behind you?
The Science Bit
In its simplest form a periscope is a tube, within this tube will be an arrangement of lenses and mirrors, or prisms. This allows the viewer to see around things or on a level that the eye cannot see.
This periscope works by a side mirror catching an image and reflecting into the tube at an angle. At the other end of the tube a second mirror will reflect the image into the viewer’s vision. These mirrors angles can be changed so viewers can see different things behind them.
Curriculum Links
Light and Dark
- That light is essential for seeing things
How we see things
- That light travels from a source
- That we see light sources because light from the source enters our eyes
- That light from an object can be reflected by a mirror, the reflected light enters our eyes and we see the object
- That when a beam of light is reflected from a surface, its direction changes