NEET Physics Wave Optics Questions Solved

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NEET - 2017

Two polarids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light Io is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45° with that of P1. The intensity of transmitted light through P2


(b) Io4

(c) Io8

(d) Io16

(c) According to the question 

From the above diagram, Intensity transmitted throughP3 


          I2=I02×122 I2=Io4

Similarly, intensity transmitted through P2

              I3=I04cos245°    I3Io4×122   I3=Io4×12 I3=Io8


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