Created by StemPy LabUnpolarised light of intensity passes through three ideal polarising sheets placed one after another. The transmission axis of the third sheet is perpendicular to that of the first sheet. The axis of the middle sheet makes an angle of with the axis of the first sheet. The intensity of the light coming out of the third sheet is
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← A compound microscope has an objective of focal length 1.0 cm and an eyepiece of focal length 5.0 cm, and the two lenses are 20 cm apart. The microscope is adjusted so that the final image is formed at the least distance of distinct vision, 25 cm from the eye, which is held close to the eyepiece. The magnifying power of the microscope is closest toA radioactive sample starts with equal numbers of nuclei of two isotopes, A and B. Isotope A has a half-life of 2 h and isotope B has a half-life of 3 h. Neither isotope decays into the other. After 12 h, the ratio of the activity of A to the activity of B is →
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