A student requires reading glasses of +1.25 diopters to read the print on this p
ID: 1515075 • Letter: A
Question
A student requires reading glasses of +1.25 diopters to read the print on this page when the page is held 25 cm from her eyes. Determine the minimum distance that she would have to hold the newspaper in order to read the print without her eyeglasses. Assume that the distance from the lens to the eye is negligible. A student requires reading glasses of +1.25 diopters to read the print on this page when the page is held 25 cm from her eyes. Determine the minimum distance that she would have to hold the newspaper in order to read the print without her eyeglasses. Assume that the distance from the lens to the eye is negligible.Explanation / Answer
we know that
power P = 1/f
f = 1/P
f = 1/1.25 = 0.8 m = 80 cm
with her glass on, the page is held at 25 cm from her eyes
and image is formed at near point
1/f = 1/d0 + 1/di
1/80 = 1/25+1/di
di = -36.36 cm
she would have to hold the newspaper at 36.36 cm in order to read the print without her eyeglasses.
answer
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.