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28 Nov 2020
Optics The equation
Sometimes called a lens -maker's equation gives the relationship between the focal length f of a thin lens,
the distance p of the object from the lens, and the distance q of its image from the lens,. We can think of
the eye as an optical system in which the ciliary muscle constantly adjusts the curvature of the cornea -lens
system to focus the image on the retina. Assume that the distance from the cornea to the retina is 2.5 cm, as shown in the figure below.
a. Find the focal length of the cornea -lens system if an object located 50 cm, away is to be focused on the retina.
b. What is the rate of change of the focal length with respect to the distance of the object when the object is 50 cm away?
Optics The equation
Sometimes called a lens -maker's equation gives the relationship between the focal length f of a thin lens,
the distance p of the object from the lens, and the distance q of its image from the lens,. We can think of
the eye as an optical system in which the ciliary muscle constantly adjusts the curvature of the cornea -lens
system to focus the image on the retina. Assume that the distance from the cornea to the retina is 2.5 cm, as shown in the figure below.
a. Find the focal length of the cornea -lens system if an object located 50 cm, away is to be focused on the retina.
b. What is the rate of change of the focal length with respect to the distance of the object when the object is 50 cm away?
Priyanshu PatelLv10
19 Dec 2020