Physics, 31.12.2019 07:31 Quakersoatmeal9
The two lenses in a microscope are separated by 19.5 cm, and the focal length of the eyepiece lens is 2.75 cm.
a) if the image of this object is viewed with the eyepiece adjusted for minimum eyestrain (image at the far point of the eye) for a person with normal vision, how far from the objective lens will the objective image need to be formed?
b) where is the object located, if the objective lens has a focal length of 0.350 cm?
c) what is the angular magnification of this microscope? (approximation)
d) if a near sighted person with a far point of 1.95 m looked through this microscope what would the distance between the two lenses need to be to get minimal eyestrain?
e) and what would that magnification be? (approximation)
Answers: 1
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Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
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The two lenses in a microscope are separated by 19.5 cm, and the focal length of the eyepiece lens i...
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