6.4 The simplest zoom lens consists of a positive and negative component Calmequivalent power for a system consisting of two thin lenses of mowers +10 D and .40 and separated by 50mm. If the -6 D lens is moved 30 mm closer to the film plane (back focal plane), calcite the separation of the lenses if the object is still to be at infinity and hence fog It equivalent power for this changed system. Comment on the difference in the final image height between the two optical Mali* the film plane.
6.14Explain briefly the following terms, with diagrams: (a) Myopic eye. (b) Hypermetropic eye. (c) Crystalline lens. (d) Far point. Why is a negative lens used to correct a myopic eye and a positive lens a hypermetropc eye for distance? Give diagrams.6.23 field glass is focused for a myope of —4 D. 04 An astronomical telescope has an objective 150 mm in diameter and a focal length of 850mm. If the eyepiece has a focal length of 25 mm and a diameter of 15mm calculate the angular magnification, the diameter of the exit pupil, the eye relief distance, and the apparent field of view (from the center of the exit pupil).
6.34The microscope of Exercise 6.11 is used to form a real image on a photographic plate 0.5m from the eyepiece (photomicrography). How far and in which direction must the microscope be moved with respect to the object in Exercise 6.11 and what will be the lateral magnification of the image?
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