A periscope allows you to see around corners or over walls. It has two mirrors inside that are at 45 degree angles that reflect the light twice.
To make the periscope the first thing that you need to do is cut out the periscope template from a piece of A4 card.
You next want to add your mirrors to the periscope template. The mirrors will need to be approximately 5cm square. You can either use silver mirror card or if you have them you can use craft mirrors.
Using a ruler you can now use it to fold along the dotted lines on the periscope template. By using the ruler it helps to keep your fold lines straight.
You can now add glue to the overlap tabs and start to put the periscope together.
We see objects when the light coming from it enters the eye. Light may have been made by the object or may have bounced off of it allowing us to see it. Light travels in straight lines which is why you normally have to look at something to see it, but if you have a periscope you are able to look at objects that are around corners or over walls
The way the periscope works is that there are two mirrors inside that are both at 45degree angles. This means that light travels into the periscope, meets the first mirror, bounces onto the second mirror and then reaches your eye, allowing you to see an object.
The video tutorial for this activity is available on the Surrey Libraries Facebook Page or YouTube Channel
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