Page 246 - Physics_Form_2
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Physics for Secondary Schools
(ii) What could be the total with a converging lens whose
magnification of this focal length is 0.05 m.
microscope? (Assume a (b) Find the image distance and
microscope is used by a person state whether the image is real
whose nearest distance for a or virtual.
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distinct vision is 25 cm). (c) Determine the magnification
11. The far point of a certain myopic and height of the image.
eye is 50 cm in front of the eye. An 13. Two students complain that they
eyeglass lens is to be worn to correct cannot see objects that are closer
this myopic eye. If the glass lens is than 1 m from their eyes.
worn 2 cm in front of the eye, find: (a) What problem do they have?
(a) The focal length of the lens Describe it using a neat ray
diagram.
will help the wearer clearly see (b) How can their problem be
an object at infinity. solved?
(b) The power of the lens.
(c) Determine the power of the
12. (a) A 1.8 m tall student stands 2.5 device that can be used to solve
m in front of a digital camera their problem
240
Student’s Book Form Two
Physics Form 2 Final.indd 240 25/10/2025 10:28
