Explain how in the previous set of measurements adding the third polarizer in some cases increased the light intensity i

[answerhappygod]

Explain how in the previous set of measurements adding the third
polarizer in some cases increased the light intensity incident on
the screen. Specifically explain how the third polarizer caused the
intensity to increase in those cases. Did the third polarizer emit
light similar to the way a light bulb emits light, or did it do
something else?
I added a polarizer on the left and right and the third
polarizer is in the middle below I recorded data please help
me.

Explain How In The Previous Set Of Measurements Adding The Third Polarizer In Some Cases Increased The Light Intensity I 1 (548 KiB) Viewed 24 times

RECORD CLEAR 180° 0° 51° 20.0% Polarizers 810 20 35 45 90 DATA 02 O 40 55 65 125 50 03 ) Intensity (%) 60 38.9 75 39.1 90 36.2 60 6.2 180 8.7 0