Question

This assignment is to be turned in on Catcourses by 11:59pm December 13, 2019. Late homework will not be accepted. You are encouraged to work with classmates, but the work you turn in must be your own. 1. Vision. Suppose your right eye can only see clearly beyond a distance of 32 cm. An optometrist orders a pair of glasses that will sit 2 cm from your eye. a. Your right eye is (circle one): nearsighted farsighted b. What is the focal length of the lens required to correct your vision? Assume a normal far point is infinity and a normal near point is 25 cm. c. Your right eye needs a (circle one): diverging lens converging lens d. What is the power of the corrective lens?

Answer 1

1.

a) Farsighited

b) 114.29 cm

c) Converging lens

d) 0.875 D

3.

a) 2.10 mm, The first red strip in left/right of the central maximum is the first bright fringe.

b) 3.16 mm, The second black strip in left/right of the central maximum is the second dark fringe.

1. Ca) farsigh ted (-25) (-32 (b) = 0875 x 10 25 = 114 29 cm Lens (c) Conves girg (d) f Cin metre) 114 29 x 102 0875 D 3. (a) where n=0,1,2, distemce of boisht folges indicates the from the centrer, Now, for n 20 maxima So the central at the Center. For first brigt foinge En=1) 3'43 x 633 x10 %3D 103 10

2.10 The first brisht frirge foom the 210 mm away bright fomge. central -12)(2m-1)2 n=1,3,5,- where the dark distence of the indicates center, foinges from the Sine, he dark fringes. so ncond -3 = 3'16X10 3'43 X 633x10 7 103x10- = 3:16 mm distance of second dark $oinge from the So, the central fro 3'16 mm bright fringe

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