Tom’s father is 48 years old. he is not able to see nearby objects clearly. (ref: p.508-511)
a. what may be the reason for his vision problem?
b. where are images formed in this type of defected vision?
c. how is this defect corrected?

a) Hypermetropia

b) Image will form behind the cornea

c) This can be corrected by using convex lens of required focal length

Explanation:

As we know that due to age the iris of the eye lens got weak due to which the  eye lens could not compress of stretch to adjust its focal length to see the far or nearby object

Due to this the focal length of eye could not adjust to see the near objects and it will form the image of nearby object behind the retina of eye

this will form blurred image and it is known as hypermetropia

This defect is corrected by using a convex lens of required focal length and this will adjust the image on the retina of eye

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i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

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jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.