are to get corrective glasses that will be placed 2.0 in front of their eyes, what power of lens would th need to clearly see an object placed infinitely far a

(a) If your relaxed eye has a refractive power of 55.1 D, and your lens-to-retina distance is 2.35 cm, determine if you are near or far sighted.nearsightedfarsighted (b) If you are nearsighted, determine your far point. If you are farsighted, determine your near point.cm

An object and an image screen are separated by 50 cm. There are two locations betweenthem where a thin lens with f = 8 cm can be placed so that a focused image forms on thescreen. Find the two positions.

A thin plastic lens with index of refractionn = 1.69 has radii of curvature given by R, = -11.5 cm and R, = 30.0 cm. HINT (a) Determine the focal length in cm of the lens. -12.05 cm (b) Determine whether the lens is converging or diverging. O converging O diverging Determine the image distances in cm for object distances of infinity, 7.00 cm, and 70.0 cm. (c) infinity -12.05 By the sign conventions for thin lenses, the negative image distances indicate the images are formed in front of the lens (on the same side as the object). cm (d) 7.00 cm cm (e) 70.0 cm cm

A far-sighted person has a near point of 1.75 m. What is the refracting power of contact lensesthat would correct their vision, resulting in a near point of 0.25 m?

MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Your physics study partner is nearsighted. She has a near point of 50.0 cm from her eyes and she wears eyeglasses designed to allow her to read a newspaper held at a distance of 28.5 cm from her eyes. Determine the focal length of her glasses for each of the following cases. (a) She wears her eyeglasses 1.80 cm from her eyes. cm (b) She wears her eyeglasses 2.80 cm from her eyes. cm

A nearsighted man wears contact lenses of -3.00 diopters. With these lenses, his corrected near point is 25.0 cm. What is his uncorrected near point?

A magnifier is rated at  3.5 X for a normal eye focusingon an image at the near point. (a) What is its focal length?(b) What is its focal length if the 3.5 X refers to a relaxed eye?

Why would you anticipate a spectacle lens of roughly 16 D to be given if the lens of a person's eye is removed due to cataracts?

A person uses corrective glasses of power -8.5 D.  (a) Is this person nearsighted or farsighted?  (b) If the glasses are worn 2.0 cm from the eye, what is the person's far point without glasses?