Science

PhysicsQ&A Library2. (a) Using table data presented in the text, calculate the focusing power Fmin of the crystallinelens in the case when eye is focused to view distant objects. (b) Knowing that focusing power of thecornea is Feornea = 42 D, calculate minimum focusing power of the eye. (c) Find what if the eyefocal length in this case. Eye optical system1. Optical power of the cornea:Fornea = F, + F =F- optical power of the cornea front surface, D; F- optical power of the cornea back surface, D; R,radius of curvature of the comea front surface, m;Clary fibersR.Vous humorComeaLene- radius of curvature of the comea back surface,R,Foram; n1 - ambient refraction index (for air n = 1 andfor water n, = 1.33); n - cornea refraction index:n- aqueous humour refraction index.2. Optical power of the erystalline lens:Ferystalline tens =F +F, = s-aE- optical power of the crystalline lens frontsurface, D; F, - optical power of the crystalline lens back surface, D; R - radius of curvature ofthe crystalline lens front surface, m; R, - radius of curvature of the crystalline lens back surface, m;n - aqueous humour refraction index; n, - crystalline lens refraction index; n; - vitreous humorOplo nerveAgueoushumorRenaScerarefraction index.Table - Parameters for the EyeRadius, mmIndex ofrefractionFrontBackR = 7.8Ramar =10Ramin =6Aqueous humour and vitreous humorR, = 7.3R4maz =6Ramie =5.5Cornean, =1.38n4 =1.4Crystalline lens (Fmin)Crystalline lens (Fmar)=1.333. Optical power of eye:F= Farnaa + Feristalline lens4. Lens equation:1 1. 1CorneaLensS- lens focal length (m); F- lens optical power (D); p- distance from the object to the lens or object distance(m); g – distance from the image to the lens or imagedistance (m).5. Height of image on the retina:h.9Н ЕH - height of image on the retina, m; h - height of object, m; q - image distance (for human eye onthe average is equal to 1.5 cm), m; p - distance of the object to optical system of the eye, m.6. Lens magnification:нH- image height (m); h - object height (m), p - object distance (m); g - image distance (m).7. Law of refraction:nisine, = nzsinezQuestion

Asked Feb 11, 2020

15 views

Can you use the formula in the second picture to answer it, please?

Focusing power of crystalline lens

(a) Minimum focusing power of crystalline lens

When focused at distant object the radius if curvature of the crystalline lens is maximum.

(b) Minimum focusing power of the eye

...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: A student who weighs 545 N climbs a stairway (vertical height of 4.3 m) in 30 s. What is the power o...

A: The work done by the student is,

Q: In the following exercises assume that there's no damping. C/G| An object stretches a spring 4 inche...

A: Click to see the answer

Q: A uniformly charged ring of radius 10.0 cm has a total charge of 76.0 μC. Find the electric field on...

A: Finding the formula to calculate the electric field due to a ring at a distance x from the center of...

Q: 24. Compressing and stretching a spring Suppose a force of 15 N is required to stretch and hold a sp...

A: Given: Force = 15 N Displacement = 0.25 m

Q: A copper kettle contains water at 22.5 °C. When the water is heated to 96.3 °C, the volume of the ke...

A: Click to see the answer

Q: An object is thrown straight down at a speed of 2.8 from a tall building. After it has fallen for 4....

A: Unit of speed is not mentioned in the question. It is assumed as m/s for calculation. Ball is moving...

Q: A charge of 5.53 uC and mass 1.82 mg initially moves at a speed of 76.2 m/s before passing through a...

A: Click to see the answer

Q: A 500 g block on a frictionless horizontal surface is attached to a spring with spring constant of 1...

A: Click to see the answer

Q: Can you please answer this question and show all of the steps

A: It is given that