10) A swimmer has dropped her goggles in the shallow end of a pool, marked as 0.75 m deep.How deep do the goggles appear to be when you look straight down into the water (n=1.33)?
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10) A swimmer has dropped her goggles in the shallow end of a pool, marked as 0.75 m deep.How deep do the goggles appear to be when you look straight down into the water (n=1.33)?
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- 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) Find an equation for the length L of a refracting telescope in terms of the focal length of the objective fo and the magnification m. L = (b) A knob adjusts the eyepiece forward and backward. Suppose the telescope is in focus with an eyepiece giving a magnification of 20.3. By what distance must the eyepiece be adjusted when the eyepiece is replaced, with a resulting magnification of 1.0 ✕ 102? Must the eyepiece be adjusted backward or forward? Assume the objective lens has a focal length of 2.32 m. (Use a positive value if the eyepiece must be moved forward toward the objective lens and negative values if the eyepiece must be moved backwards.) cm2) A person whose eyes are1.5 m above ground approaches a pool of water of depth 2m and length 1.5 m. At what distance from the edge of the pool will she first see a point at the bottom of the pool?
- 8SC ↓ 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 ㄱ4. In a church choir loft, two parallel walls are 5.30 m apart. The "singers stand against the north wall. The organist faces the south wall, sitting 0.800 m away from it. So that she can see the choir, a flat mirror 0.600 m wide is mounted on the south wall, straight in front of the organist. What width of the north wall can she see? Hint: Draw a top-view diagram to justify your answer.What is the focal length of the lens in your eye when you can focus on an object at your near point? Assume that the distance from your lens to the back of your eye is 2.0 cm, that your near point is 21 cm in front of your lens, and that the liquid behind the lens has n=1.00 just like the air in front of your lens. (a) 1.8 cm (b) 18 cm (c) 2.1 cm (d) 21 cm (e) None of the above.
- Bailey has a eyeglasses with a prescription of -4.00−4.00D. While wearing these glasses so that the lenses sit 2.002.00 cm in front of the eyes, Bailey can see distant object clearly with fully relaxed eyes. a) What is the far point for Bailey's uncorrected vision? b)If Bailey wants to switch to wearing contact lenses placed directly on the eye, what contact lens power should be prescribed? Give your answer in diopters, using the correct positive or negative sign.10 A glass lens 3 cm thick along the axis has one convex face of radius 5 cm and the other, also convex, of radius 2 cm. The former face is on the left in contact with air and the other in contact with a liquid of index 1.4. The refractive index of the glass is 1.50. Find the positions of the foci, principal planes, and focal lengths of the system. Use the matrix approach.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?