Question

An unpolarized beam of light is incidents on a group of four polarizing sheets, which are arranged in such a way, that of the characteristic direction of each polarizing sheet makes an angle of ${30}^0$ with that of the preceding sheet. The percentage of incident light transmitted by the first polarizered will be :

• A. $100\%$
• B. $50\%$
• C. $25\%$
• D. $12.5\%$

Answer 1

The correct option is B $50\%$

Since the natural light is unpolarized, the first polaroid reduces the intensity to half. Therefore, percentage of incident light transmitted by first polarized is 50%