A – 150 x microscope has an eyepiece whose focal length is 4.4 cm. If the distance between the lenses is 20 cm, find the focal length of the objective.
Answer to relevant QuestionsA specimen is 5.0 mm from the objective of a com-pound microscope that has a lens power of + 250 D. What must be the magnifying power of the eyepiece if the total magnification of the specimen is – 100 x? A certain farsighted person has a near point of 50 cm. (a) Which type of contact lenses, (1) converging, (2) diverging, or (3) (2) diverging, or(3) bifocal, should an optometrist prescribe to enable the person to see ...(a) For a given wavelength, a wider single slit will give (1) a greater, (2) a smaller, (3) the same minimum angle of resolution as a narrower slit, according to the Rayleigh criterion. (b) What are the minimum angles of ...Assuming that the headlights of a car are point sources 1.7 m apart, what is the maximum distance from an observer to the car at which the headlights are distinguishable from each other? Referring to Fig. 25.25, show that the angular magnification of a refracting telescope focused for the final image at infinity is m = – fo/fe. (Because telescopes are designed for viewing distant objects, the angular size ...
Post your question