Concept explainers
(a)
The uncorrected far point.
(a)
Answer to Problem 63P
The uncorrected far point is
Explanation of Solution
Write the equation to find the distance between the glass and book.
Here,
Write the lens formula.
Here,
Rewrite the above relation in terms of
Write the equation to find the corrected far point.
Here,
Conclusion:
Substitute
Substitute
Substitute
Therefore, the uncorrected far point is
(b)
Power of lens required for distance vision.
(b)
Answer to Problem 63P
Power of lens required for distance vision is
Explanation of Solution
Object distance is taken as infinity for distant objects.
Write the equation to find
Write the relation between
Here,
Conclusion:
Substitute
Substitute
Substitute
Therefore, the power of lens required for distance vision is
(c)
Power of two lenses required for clear vision from
(c)
Answer to Problem 63P
Power of two lenses required for clear vision from
Explanation of Solution
Object distance is taken as infinity for distant objects.
Write the equation to find
Here,
Write the equation to find
Conclusion:
Substitute
Substitute
Substitute
Substitute
Therefore, Power of two lenses required for clear vision from
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