camera

• A pinhole camerais a simple camera without a lens and with a single small hole or an opening through which light passes.
• Light from a scene passes through this single hole and projects an inverted image on the opposite side of the box.
• An inverted image is formed in a pinhole camera because the light rays coming from the top and bottom of the object intersect at the pinhole.
• The smaller the hole, the sharper the image up to a certain point, but the projected image is dimmer.
• The human eye in bright light is similar to a pinhole camera.
• The pinhole camera is used to view the images of various objects such as trees, buildings etc.
• It can also be used to take a photograph of an object if a photographic film is placed on the screen.
• The pinhole camera works on the principle that light travels in a straight line.
• The image in a pinhole camera is

1. Inverted, i.e. upside down
2. Real i.e. can be obtained on the screen
3. The same colour as the object
4. Smaller, equal or bigger than the object