1. Shadows

3. Floor

5. Wall

7. Torch

9. Solid Object

11. Turning torch on

13. Light rays from torch

14. Light rays from torch absorbed and reflected by wall.

16. It is the reflected light that allows us to see the wall

17. Light rays from torch absorbed or reflected by object

19. It is this diffused reflection of the light that allows us to see the wall and object. These reflected rays also allow us to see the back of the object and the wall without direct torch light

22. No direct light from torch

26. Shadow of object on wall.

27. The shadow is higher than the object.

28. This is due to the angle formed by the light rays hitting and missing the object

29. We can change the height of the shadow by moving the object and the torch.