QuestionWith a near point of 18.0 cm, a nearsighted professor can focus onrelatively nearby objects. Yet, with a far point 61.0 cm out, hecannot clearly see distant objects without optical aid.(a) Calculate the focal length (in cm) of a contact lens that wouldenable this professor to clearly view very distant objects. (Hint:Allow p to approach infinity in the thin-lens equation).cm(b) What power (in diopters) describes this contact lens?diopters(c) When this contact lens is in use, what is the professor's nearpoint (in cm)?cm(d) Which statement best describes the consequences of correctingdistance vision, when it comes to viewing nearby objects?(i)Contacts or glasses for nearsightedness have no effect upon howyou see very close objects.(ii)Contacts or glasses for nearsightedness make it easier to seevery close objects, too.(iii)Contacts or glasses for nearsightedness make it harder to seevery close objects.

a) Given, near point = 18 cm far point = 61 cm A short sighted person has to use a concave lens to…

Answered: With a near point of 18.0 cm, a…

Similar questions

Is this question set up wrong? I think the statement "The magnification of a book held 7.50 cm from a 10.0 cm-focal length lens is 3.00." is impossible using the lens equation 1/do + 1/di = 1/f and the equation for magnification m = -di / do.
An object is in front of a converging lens (f = 0.35 m). The magnification of the lens is m = 2.5. (a) Relative to the lens, in what direction should the object be moved so that the magnification changes to m = -2.5? (b) Through what distance should the object be moved? (a) (b) Number i eTextbook and Media Save for Later Attempts: 0 of 5 used Units Submit Answer
Your camera’s zoom lens has an adjustable focal length ranging from 55 to 150 mm. Part (a) What is the maximum power of the lens, Pmax, in diopters? Part (b) What is the minimum power of the lens, Pmin, in diopters?
Use the worked example above to help you solve this problem. The near point of a patients eye is 50.0 cm. (a) What focal length must a corrective lens have to enable the eye to see clearly an object 29.9 cm away? Neglect the eye-lens distance. 69.0 x cm (b) What is the power of this lens? +1.45 X diopters (c) Repeat part (b), taking into account the fact that, for typical eyeglasses, the corrective lens is 2.00 cm in front of the eye. +2.21 X diopters
A patient cannot clearly see any object that lies closer than 32.0 cm to her right eye. However, the patient wishes to see objects as close as 20.0 cm with that eye. The patient requests eyeglasses to address the problem. (a) Is the patient nearsighted or farsighted? nearsightedfarsighted (b) If the eyeglass lens lies 2.10 cm in front of the patient's eye, what is the minimum distance p (in cm) separating the lens from an object she wants to see? (Give your answer to at least three significant digits.) cm (c) The patient is unable to focus clearly on anything closer than 32.0 cm to her eye (this being the patient's near point). The image formed by the eyeglass lens must therefore be 32.0 cm from the eye. How far, then, (in cm) would the image lie from the lens? (Give your answer to at least three significant digits.) cm (d) The image lies on the same side of the lens as the original object. Is the image real or virtual, and is its position q positive or…
is: On H 5 T Key Idea Stock of Data Solution Sanity Check 7. For a converging lens with a focal length of 12 cm viewing an object at a distance of 6 cm. Where is the image located? Physics-Problem Solving Entries Key Idea Stock of Data Solution Sanity Check Accessibility: Good to go Q Search F6 F7 & 6 7 Y U F8 * 0 8 8 11 1 F9 F10 9 O O O F11 ) 0 P F12 H Prt
People who do very detailed work close up, such as jewellers, often can see objects clearly at much closer distance than the normal 25 cm. (a) What is the power in D of the eyes of a woman who can see an object clearly at a distance of only 7.30 cm? (Assume the lens-to-retina distance is 2.00 cm.) ____D (b) What is the size in mm of an image of a 6.00 mm object, such as lettering inside a ring, held at this distance? (Include the sign of the value in your answer.) ______mm (c) What would the size of the image be in mm if the object were held at the normal 25.0 cm distance? (Include the sign of the value in your answer.) _____mm
Use the worked example above to help you solve this problem. The near point of a patients eye is 50.0 cm. (a) What focal length must a corrective lens have to enable the eye to see clearly an object 28.5 cm away? Neglect the eye-lens distance. 50 x cm (b) What is the power of this lens? 2 diopters (c) Repeat part (b), taking into account the fact that, for typical eyeglasses, the corrective lens is 2.00 cm in front of the eye. 2.26 X diopters
let aperture stop == radius of lens == object height
A near-sighted man can only focus on distances of dfar = 5.66 m or closer. What power lenses does he need in his glasses for distance vision? Your answer should be in diopters (m-1).
Molly has a near point at 45 cm and requires eyeglasses to correct her vision. - What should be the prescription (i.e. the lens power) for her eye? Note: Corrective lenses are available in increments in power of 0.25 diopters, e.g. +1.0, +1.25, +1. 50,...,etc. (Answer must be divisible by 0.25 and the lenses should have the lowest power for which the new near point with the lens is no further than 25 cm) - A 9.0 mm base curve (i.e. radius of curvature) will best fit her cornea. Using the material with index of refractive 1.422, what should be the radius of curvature for the other side of the lens? - What is the new far point after wearing the contact lens.