The Eye as a Pinhole Camera
Science: KS3, topic 3.3.24
The Eye as a Pinhole Camera
The human eye is often compared to that of a pinhole camera.
Pinhole cameras
- The pinhole camera is a simple camera without a lens.
- The pinhole is small to allow the image to be as focused as possible.
- The first pinhole cameras were used in 500 BC.
- Images are formed on photosensitive paper at the back of the camera.
Comparison to the eye
- The eye is compared to the pin hole camera because:
- Light enters the pin hole as light enters the pupil.
- An image forms on the screen, like on the retina.
- The image is also upside down.
Real images
- Both images are ‘real’ images.
Test yourself on The Eye as a Pinhole Camera
Why is the human eye like a pinhole camera?
Which of these is NOT a property of a pinhole camera?
When were the first pinhole cameras used?
A pinhole camera's hole is made much bigger than normal. What would happen to the image?