| A near-sighted person can clearly read a newspaper when it is placed at a maximum distance of 2.0 m from their eyes. What is the focal length of this person's corrective lenses?

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An antelope is 20.0 m from a converging lens with a focal length of 30.0 cm. The lens forms an image of theanimal. If the antelope runs away from the lens at a speed 5.00 m/s, how fast is the image moving? Does the imagetoward or away from the lens?

Consider a converging lens whose focal length is 5.87 cm. An object is placed on the axis of the lens at a distance of 11.7 cm from the lens. How far is the object's image from the lens? image distance: cm If it can be determined, is the image real or virtual? real virtual cannot be determined If it can be determined, is the image upright or inverted with respect to the object? O upright cannot be determined O inverted

|Resources L Give U A physicist's left eye is myopic (i.e.., nearsighted). This eye can see clearly only out to a distance of 27 cm. Find the focal length and the power of a lens that will correct this myopia when worn 2.0 cm in front of the eye. cm focal length: diopters power: Is this a converging or a diverging lens? O diverging converging

Darcy suffers from farsightedness equally severely in both eyes. The focal length of either of Darcy's eyes is 18.9 mm in its most accommodated state (i.e, when the eye is focusing on the closest object that it can clearly see) What lens strength (a.k.a., lens power) of contact lenses should be prescribed to correct the farsightedness in Darcy's eyes? When wearing her contact lenses, Darcy's corrected near point should be 25.025.0cm. (Assume the lens-to retina distance of Darcy's eyes is 2.00 cm, and the contact lenses are placed a negligibly small distance from the front of Darcy's eyes)   Answer choices: a) 2.45 D  b) 1.09 D c) 1.37 D d) 3.49 D e) 1.92 D

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Which of the following changes would increase the focal length of a lens? O increase index of refraction of lens material. O increase radius of curvature of surface. O decrease radius of curvature of surface. use red colored lens material.

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

A nearsighted person has a far point of 25.3cm and is prescribed contact lenses to correct her vision. What lens strength (a.k.a., lens power), in Diopters, should be prescribed? Give your answer using the usual convention of positive values for converging lenses and negative values for diverging lenses.