Task id13227
The lens of theater binoculars is a converging lens with a focal length F1 = 8 cm, and the eyepiece is a diverging lens with a focal length F2 = -4 cm. What is the distance between the lens and the eyepiece if the image is viewed by the eye from the distance of best vision? How much do you need to move the eyepiece so that the image can be viewed with an eye adjusted to infinity?
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