HW9_soln[1]

HW9_soln[1] - 26-86: Picture the Problem: The figure shows...

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26-86: Picture the Problem : The figure shows a glass lens which creates a virtual, upright image of a distant object. Strategy: Use equation 26-16 to calculate the focal length, where the object distance is infinite (so o 1 d = 0). Solution: 1. (a) A concave lens can produce an image of a distant object within Albert’s far point, which allows 2. (b) Calculate the focal length: 1 1 i oi i 11 1 0 2.2 m fd dd d     Insight: For these glasses, the images of objects at finite distances will be located at distances less than 2.2 m. For example, the image of an object at 10.0 m will be located at a distance of 1.8 meters from the lens. 27-20: Picture the Problem: The refractive power of a lens is the inverse of its focal length (in meters). Strategy: Invert the refractive power to obtain the focal length. Solution: Calculate the focal length: 0.0233 m 2.33 cm refractive power 43.0 diopters f  Insight:

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This note was uploaded on 10/13/2011 for the course PHY 102 taught by Professor Alexandrakis during the Fall '06 term at FIU.

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HW9_soln[1] - 26-86: Picture the Problem: The figure shows...

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