Five polarizers are stacked, with the polarizing axis of the second, third, fourth and fifth polarizers at angles ofn10,20,30, and 40 degrees relative to that of the first. The first polarizers axis is vertical.   I) if unpolarized light of intensith Io is incident on the first polarizer, find the intensity in terms of Io of light emergind from the last 5th polarizer.   II) if the second polarizer is removed,  but the others are left uncharged,what is the final intensity of the light emerging from the last polarizer in the stack?

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.