Shadows - PowerPoint PPT Presentation

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Shadows

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  1. Shadows

  2. Floor

  3. Wall

  4. Torch

  5. Solid Object

  6. Turning torch on

  7. Light rays from torch

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

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

  10. Light rays from torch absorbed or reflected by object

  11. 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

  12. No direct light from torch

  13. No direct light from torch

  14. Shadow of object on wall.

  15. The shadow is higher than the object.

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

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