A 72 year old woman has a near point of 88 cm. What power lens (in diopters) does the woman need in order to be able to see an object clearly at the normal near point of 25 cm? Assume that the woman will get contact lenses, that is neglect the two centimeters that glasses would be away from the eye. 3005 This is an example of farsightedness. The correcting lens (converging in this case) has to move the (virtual) image of an object placed at the normal near point (o) to the actual near point the woman (1). Then you can calculate the focal length of the lens. Remember that the image is virtual. Submit Answer Incorrect. Tries 1/99 Previous Tries Post Discussion Send Feedb

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.

Create a ray diagram for eyeglasses that contain a diverging lens. Assume you are looking at a 2 cm tall object that is 4 cm from the lens. The focal length is 3 cm. What type of vision are they used to correct? Give both names. How do they do this? Explain.

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?

What power of spectacle lens is needed to correct the vision of a nearsighted person whose far point is 40.0 cm? Assume the spectacle (corrective) lens is held 1.80 cm away from the eye by eyeglass frames

Question 1 A diverging lens has a focal length of 10 cm. An object is placed at a Not complete distance of 15 cm to the left of the lens. What is the image position? Marked out of 10.00 Select one: P Flag 10 cm to the left of the lens а. question O b. 6 cm to the left of the lens О с. 6 cm to the right of the lens O d. 15 cm to the left of the lens е. 15 cm to the right of the lens Check

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