Show that for thin lenses that have focal lengths f1 and f2 and are in contact, the effective focal length (f) is given by
Answer to relevant QuestionsAn optometrist prescribes glasses with a power of – 4.0 D for a nearsighted student. What is the focal length of the glass lenses? A converging glass lens with an index of refraction of 1.62 has a focal length of 30 cm in air. (a) When the lens is immersed in water, the focal length of the lens will (1) increase, (2) remain the same, (3) decrease. ...A student is given a piece of glass (n = 1.60) to make a symmetrical biconvex lens so it can form an image with a magnification of when the object is 5.00 m from the lens. What should be the radius of curvature of the lens ...To study wave interference, a student uses two speakers driven by the same sound wave of wavelength 0.50 m. If the distances from a point to the speakers differ by 0.75 m, will the waves interfere constructively or ...A lens with an index of refraction of 1.60 is to be coated with a material (n = 1.40) that will make the lens nonreflecting for yellow-orange (λ = 515nm) light normally incident on the lens. What is the minimum required ...
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