- #1
Felipe Lincoln
Gold Member
- 99
- 11
When a non-polarized electromagnetic wave cross a polarizer filter, its intensity drops to a half. Then this now polarized wave cross a polarizer such that it has 90 degree compared to the other. The wave is completely vanished. But if we put another polarizer with, let's say 45 degree in comparison with the first, the wave pass through all the three polarized and is not vanished. Its intensity is ##\frac{1}{2}I_0\cos^245\cos^245 ##.
It seems that the tricky happened when the polarized wave let's with 0 degree from the vertical axis passes through the 45 degree polarizer it breaks into vertical and horizontal components, if it wasn't true the wave would disapear when crossing the last 90 degree polarizer (horizontal).
Why the wave doesn't disapear after adding the third polarizer in between the two perpendicular polarizers?
It seems that the tricky happened when the polarized wave let's with 0 degree from the vertical axis passes through the 45 degree polarizer it breaks into vertical and horizontal components, if it wasn't true the wave would disapear when crossing the last 90 degree polarizer (horizontal).
Why the wave doesn't disapear after adding the third polarizer in between the two perpendicular polarizers?