A person's eye lens is 2.8 cm from the retina,and his near point is at 25 cm.What must be the focal length of his eye lens so that an object at the far point of the eye will focus on the retina?
A) -2.8 cm
B) 2.8 cm
C) -2.4 cm
D) 2.4 cm
E) 2.2 cm
Correct Answer:
Verified
Q20: Nearsightedness is usually corrected with
A)converging lenses.
B)diverging lenses.
C)convex
Q21: Chromatic aberration in lenses is due to
Q22: A person's near point is 25 cm,and
Q23: Which of the following statements are correct?
Q24: A farsighted girl has a near point
Q26: The near point of a farsighted person
Q27: A myopic (nearsighted)child wears contact lenses that
Q28: Spherical lenses suffer from
A)both spherical and chromatic
Q29: What is the power of a lens
Q30: A refracting telescope has a magnification M.If
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