The uncorrected far point of Colin's eye is 2.90 m. What refractive power contact lens enables him to clearly distinguish objects at large distances? bart D
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- Similar to the above question, I have a refracting telescope with an objective lens focal length f=200 mm. I have three possible eyepiecesI can use with this telescope, having focal lengths of 9 mm, 25mm and 50 mm. I want to look at a cluster of stars which are well spread apart from each other on the sky. Which eyepiece would I best use for this? A. 9 mm B. 25 mm C. 50 mm D. It doesn't matter which onea beam of laser light, wavelength 725.3 nm in air is incidnet on a block of unknown transparent material at an angle of 27 degrees. Its wavelength in the new equilibrim is 562 nm. 1. Find the angle of refraction in the material 2. Find the index of refraction of hte materialA very myopic man has a far point of 21.0 cm. What power eyeglasses (in diopters, held 1.52 cm from the eyes) will correct his distant vision? D
- O Resources A farsighted eye is corrected by placing a converging lens in front of the eye. The lens will create a virtual image that is located at the near point (the closest an object can be and still be in focus) of the viewer when the object is held at a comfortable distance, usually taken to be 25.0 cm. If a person has a near point of 31.5 cm, what power reading glasses should be prescribed to treat this hyperopia? Assume that the distance from the eye to the lens is negligible. diopters power:A severely myopic patient has a far point of 3.35 cm. By how many diopters should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him? (Assume a lens-to-retina distance of 2.00 cm.) Additional Materials O ReadingA nearsighted woman has a far point of 280 cmcm . Part A What kind of lens, converging or diverging, should be prescribed for her to see distant objects more clearly? converging diverging she doesn't need lens not enough information to estimate Part B What refractive power should the lens have? Express your answer in diopters.