A friend tells you that when she takes offher eyeglasses and holds them 23 cm above a printed page theimage of the print is erect but enlarged to 1.5 times its actual size. (a) Is the image real or virtual? How do you know? (b) What isthe focal length of your friend’s glasses? (c) Are the lenses in theglasses concave or convex? Explain

An optometrist determines that a patient cannot clearly see any object that lies closer than 54.8 cm to the patient's eye. (a) Which of the following terms best describes this distance? O near point O magnification O far point O focal length (b) The patient needs to be able to clearly see objects that are just 27.0 cm distant. A contact lens is called for. What focal length (in cm) should this lens have? Assume the lens can be modeled as an ideal thin lens, which lies adjacent to the eye. cm (c) What is the power, P, of the contact lens (in diopters)? diopters

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An object is placed a distance of 7.02f from a converging lens, where f is the lens's focal length. (Include the sign of the value in your answers.) (a) What is the location of the image formed by the lens? d; = (b) Is the image real or virtual? O real O virtual (c) What is the magnification of the image? (d) Is the image upright or inverted? O upright O inverted

A positive lens has a focal length of 51 cm. An object is located at a distance of 2 cm from the lens. NOTE: This is a multi-part question. Trace three rays from the top of the object to confirm your results. (Please upload your response/solution).

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

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

What would be the image distance for the +20.0 cm lens if the object distance were +60.0 cm? What would be the corresponding magnification of the image? Would the image be upright or inverted?