Physics Light and Optics MCQs 56. Question In double refraction, two refracted rays are produced, called as O-ray and E-ray. Which of the following statements is TRUE only O-ray is polarised only E-ray is polarised both O-ray and E-ray are polarised neither E-ray nor O-ray are polarised Answer 57. Question Which of the following is Malus law I=Io² cos²Θ I=Io cos²Θ I=Io sin²Θ I=Io² sin²Θ Answer 58. Question Polarimeter is a device used for measurement of optical rotation measurement of angle of polarisation measurement of angle of reflection measurement of angle of refraction Answer Pages: 1 2 3 4 5 6 7 8 9 10 11 12