3. A near-sighted individual wears glasses with a prescription of-2.4 D. The eyeglasses sit 1.75 cm away from the person's eyes. What is this person's far-point?
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- 2-A. A man with myopia has a far point of 20cm. What power contact lens will correct his vision? B. Repeat the same problem for glasses held 1.5cm from his eyes.Problem 102. My wife Margie has lost most of her accommodation. She has a nearpoint of 130 cm and would like to read as close as 40 cm from her eyes. A) What power reading glasses should Margie use? Assume the lenses in the glasses are 2 cm from the eye. B) What is Margie's farpoint while wearing reading glasses?
- A large reflecting telescope has an objective mirror with a10.0 m radius of curvature. What angular magnificationdoes it produce when a 3.00 m focal length eyepiece isused?6. A nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of -3.00 diopters. He would like a prescription for contact lenses. What is the correct contact lens distance of 2.0 cm from his eyes? diopters ssf60 ss prescription if he normally wears his eyeglasses a f60 ssf60 pre 0 ssf60 sta8SC ↓ Exam in Progress 57°F Sunny C2 121 A/ The refractive power of a lens of focal length +40 cm is Ⓒ +4.0 D. O +0.16 D. O +0.40 D. O +2.5 D. O -2.5 D. Q Search *43 3 -- $ WILE S|D % R LO Il app.honorlock.com is sharing your screen. 99+ TI hp a Stop s 55 ㄱ
- 6. If you open your eyes underwater, you do not get a well-focused image on your retina. But if you wear goggles or a mask, you will see normally. Explain why this is the case.1. A patient enters an eye doctor’s office and finds the doctor tells him that his near point is 10.0 cm. The doctor also finds the patient’s far point (with eyes relaxed) is 125 cm. Each eye lens can be assumed to be 2.00 cm from the retina. a) Between what limits (units: diopters) does the power of this patient’s lens (technically lens+cornea combination) vary? b) The doctor is going to prescribe glasses. Calculate the power of the eyeglass lens the patient should use for relaxed distance vision. Is the lens converging or diverging?6. A 2.0 cm tall object is 15 cm in front of a converging lens that has a 20 cm focal length. (a) Use ray tracing to find the position and height of the image. To do this accu- rately, use a ruler or a paper with a grid. Determine the image distance and image height by making measurements on your diagram. (b) Calculate the image position and height. Compare with your ray-tracing an- swers in part a.