Three circularly shaped linear polarisers are placed coaxially. The transmission axis of the first polariser is at 30°, the second one is at 60° and the third at 90° to the vertical all in the clockwise sense. Each polariser additionally absorbs 10% of the light. If a vertically polarised beam of light of intensity I = 100 W/m^{2} is incident on this assembly of polarisers, then the final intensity of the transmitted light will be close to

Question

Three circularly shaped linear polarisers are placed coaxially. The transmission axis of the first polariser is at 30°, the second one is at 60° and the third at 90° to the vertical all in the clockwise sense. Each polariser additionally absorbs 10% of the light. If a vertically polarised beam of light of intensity I = 100 W/m^{2}  is incident on this assembly of polarisers, then the final intensity of the transmitted light will be close to

Examsnet · Accepted Answer

Correct Answer is :  30 W/m‌2

KVPY SX SB Exam 19-Nov-2017 Question Paper