A farsighted person cannot focus clearly objects that are less than 145 cm from his eyes. To correct this problem, the person wears eyeglasses that are located 2.0 cm in front of his eyes. Determine the focal length that will permit this person to read a newspaper at a distance of 32 cm from his eyes.
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Given A farsighted person cannot focus clearly objects that are less than 145 cm from his eyes. To correct this problem, the person wears eyeglasses that are located 2.0 cm in front of his eyes. Determine the focal length that will permit this person to read a newspaper at a distance of 32 cm from his eyes
- Distant objects need to be imaged at most 145 cm from the eye.
- So do = 32 cm and d1 = - 145 cm
- Now f = d1do / do + d1
- = 145 x – 32 / 32 – 145
- = - 4640 / - 113
- So f = + 41.06 cm
- Since focal length is positive it is a converging lens.
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https://brainly.in/question/3321251
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