In class we mostly learned about how altering the distances in between the lens and the object itself would change the image produced.
Let u be the distance between the lens and the object.
Let f be the focal length.
1. u>2f
-The image produced is INVERTED
-The image produced is DIMINISHED
-The image produced is REAL
A common application for this would be the CAMERA. We want to capture moments that can be reproduced, hence they are REAL. It is also difficult to capture the ENTIRE size of the scene, hence we would want a diminished picture.
2. u=2f
-The image produced is INVERTED
-The image produced is the SAME SIZE AS THE OBJECT
-The image produced is REAL.
A logical application of this would be the PHOTOCOPIER. We want to reproduce an exact copy of the object, hence we would need the image to be the SAME SIZE. The image has to be REAL too in order to be produced on the new paper.
3. f
-The image produced is INVERTED
-The image produced is ENLARGED
-The image produced is REAL
An application for this would be the PROJECTOR. We use the projector to project data onto a larger screen so that it is clearer. In this case we would need the image to be ENLARGED. The image has to be REAL to in order to be projected on the screen.
4. u
-The image produced is UPRIGHT
-The image produced is ENLARGED
-The image produced is VIRTUAL
An application for this would be the MAGNIFYING GLASS. The magnifying glass allows us to see things larger, hence the image is ENLARGED. The image is however, unable to be produced on a screen, hence it is VIRTUAL.
5. u=f
-There will be NO image formed.
An application for this would be the spotlight so that an amount of light can be projected on a small area. Hence there is no IMAGE.
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