of the final image measured from the right lens. the left lens. Determine the po
ID: 2304551 • Letter: O
Question
of the final image measured from the right lens. the left lens. Determine the position as Repeat #12 where the left lens is a converging lens and the right lens is a diverging lens. 4. Without glasses, your Uncle Albert can see things clearly only if they are between 35 cm and 160 cm from his eyes. (a) What type of lens will correct his myopia? (b) What is the power of this eyeglass lens? Assume the lenses sit 2 cm from his eyes. (c) What is your uncle's near point when wearing these glasses? 5. The relaxed eyes of a patient have a refractive power of 48.5 diopters. (a) Is this patient nearsighted or farsighted? Explain. (b) If this patient is nearsighted, find the far point; if the patient is farsighted, find the near point. Let the retina be 2.4 cm from the lens in this questionExplanation / Answer
14]
a] Myopia is a condition where the distant objects cannot be focused well onto the retina. Diverging lenses correct this type of condition. The light from the object diverges before reaching the cornea and it is then correctly focused onto the retina.
b]
The object distance is desired to be infinity
image distance = v = 35 - 2 = 33 cm
so, - 1/f = 1/infinity + 1/33
=> f = - 33 cm = - 0.33.
this is the desired focal lens of the glasses
power of the glasses will be: P = -1/f = 3.03 D.
c]
Use this along with object distance of u = 160 - 2 = 158 cm
- 1/33 = 1/158 + 1/v
=> v = - 27.3 cm
this is the near point after wearing the glasses.
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