Today I noticed something while playing with my specs (having diverging lenses).
Have a look at it :
This is the shadow of my specs on the wall in sunlight. The region of the lens appears darker and the edges appear extremely brighter (brighter than even the part of the wall outside the shadow). This leads me to two main questions:
- Why is the region of the lens appearing dark ?
- And why are the edges the brightest part of the wall ?