Draw and explain the process of formation of image with a pinhole camera'?

A pinhole camera is a simple camera without lens. It is made by taking a box in which is completely light proof that is dark with a small hole at one side. Light from the object enters this extremely small hole & projects an inverted image on the opposite side of the box. The size of the hole should be 1/100 or less of the distance between it and the projected image. If the hole is too small then it would result in diffraction and if it’s too large then we will see the object as it is. Pin hole camera works on the principle called rectilinear theory of light which states that light travels in a straight path.

1. The tree is being enlightened by sunlight. So the whole tree act as a source of light.

2. Light from the top of the tree enters the hole and goes straight towards the bottom of the screen.

3. Light from the bottom of the tree enters the hole and goes straight towards the top of the screen.

4. So, in this way light coming from the tree which travels in a particular direction enters the pinhole & light which travels in other directions were blocked.

5. This creates a sharp inverted image of the object.