97. ssm Mars subtends an angle of 8.0 x 10-5 rad at the unaided eye. An as- tronomical telescope has an eyepiece with a focal length of 0.032 m. When Mars is viewed using this telescope, it subtends an angle of 2.8 × 10-³ rad. Find the focal length of the telescope's objective lens.
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- A magnifying glass uses a converging lens with a refractive power of 20 diopters. What is the magnification if the image is to be viewed by a relaxed eye (image at the far point) having a near point of 25 cm and a far point at infinity? С. 5.0х 8. Α. 1.25x В. 4.0х D. 20x Е. 500хChapter 25: Problem 14: Consider a camera whose lens has a 41 mm focal length. a) What is the power P, in diopters, of the camera lens?st 8. A converging lens (f₁ = 12.0 cm) is located 27.3 cm to the left of a diverging lens (f₂ placed 32.4 cm to the left of the converging lens. Find the overall magnification. ssf60*³ f60 ssf ssf60 ssi f6 -6.6 cm). A postage stamp is sf60 ssf60 50 sst
- VARIANT 14 1. A clear glass light bulb is placed 1.5 m from a convex lens having a 45 cm focal length. Use ray tracing to get an approximate location for the image. Then use the thin lens equations to calculate (a) the location of the image and (b) its magnification. Verify that ray tracing and the thin lens equations produce consistent results. 2. When driving you need to be able to clearly see road signs and traffic some distance ahead of you as well as the dashboard in your car. Assume that you have a normal lens-to-retina distance. (a) What minimum optical power of the eye is needed to clearly see a road sign 150 m ahead? (b) What maximum optical power is needed to clearly see the dashboard 50 cm away? (c) What range of accommodation AF is needed? 3. Determine the speed of the electrons incident on the anode surface of the X-ray tube if the minimum wavelength of the emitted X-ray radiation was 5 nm. 4. A 5000-Ci 60Co source used for cancer therapy is considered too weak to be…13.) Which of the following is FALSE regarding hyperopic persons? Their corrective lens is a convex or converging lens. The lenses of their eyes form images that are beyond their retinas. The person can only distinctly see objects that are far from the eye. The focal lengths of their lenses are shorter than they should be.2-
- 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?8. A nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of -2.50 diopters. He would like a prescription for contact lenses. What is the correct contact lens prescription if he normally wears his eyeglasses a distance of 3.0 cm from his eyes? diopters oof6. 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 sta
- 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 ㄱ1. 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?Q1 a) The eyepiece of a refracting telescope has a focal length of 9.00cm. The distance between objective and eyepiece is 1.80m, and the final image is at infinity. What is the angular magnification of the telescope? F=580×10² 14