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ta The Expert TAIHumar x a Track Package x Watch Taken 3 Online FirstRow Sports Live F x bt Meissa Franklin l Big M. Fran x C Chegg Study Guided X Bh Blackboard Learn x x C https:// /Common/TakeTutorial Assignment.aspx usi38ok.theexpertta.com Stud My Accou Log Ou Class Management I Help Homework ll Begin Date: 4/15 2016 12:00:00 PM Due Date: 5/2/2016 5:00:00 PM End Date: 5/2/2016 5:00:00 PM (7%) Problem 2: A person who is nearsighted has a far point of do 4.7 She wears glasses that are designed to sit d 2.6 cm from her eyes. Randomized Variables 4.7 d 2.6 cm. Assignment Status Click here for A 50% Part dan Write an expression for the focal length of the glasses which will allow her to see distant objects clearly detailed view Grade Summary Deductions Potential 100% Problem Status Sub 4 5 6 Attempts remaining: (0% per attempt detailed view Hints deduction per hint. Hints remaining: 5 back 0% deduction per feedback. A 50% Part (b) cally. what is the focal length in m? All content E 2016 Expert TA, LLC You need some updates. Select this message to insta javascript: void(0) 8:09 AM I'm Cortana. Ask me anything

Explanation / Answer

a )

given

far point of d0 = 4.7 m

d = 2.6 cm = 0.026 m

focal length f = ?

then the expression for focal point is

1 / f = 1 / d + 1 / d0

b )

now to find the focal length f is

uisng above equation

1 / f = 1 / d + 1 / d0

1 / f = 1 / 0.026 + 1 / 4.7

1 / f = 38.46 + 0.212

1 / f = 38.672

f = 1 / 38.672

f = 0.025 m

or

f = 2.5 cm is the focal length

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