Construction:
- Take two cardboard boxes such that one can slide into the other with no gap in between them.
- Cut or open one side of each box.
- On the opposite face of the larger box , make a small hole in the middle.
- Cut out a square of side 5-6cm from the middle of the smaller box and cover the square with tracing paper.
- Slide the smaller box inside the bigger one in such a way that the tracing paper faces inwards.
- The pinhole camera is ready.
Working:
- Cover both your head and the camera with a black cloth and look through the open face of the smaller box.
- Make sure the objects you want to look at are in bright sunshine.
- Move the box forward and backward until you are able to see the image on the tracing paper.
- An inverted and coloured image can be seen.
Principle:
The working of a pinhole camera is based on the principle that light always travels in a straight line.
Natural pinhole Camera:
Sometimes on a sunny day when we pass through a tree with a lot of leaves , we are able to notice small patches of sunlight under it.
These circular images are nothing but the images of the sun and the gaps between leaves act as piholes.
