Chapter 34, Problem 078 More lenses. Object converging or diverging. (b) the foc

Question

Chapter 34, Problem 078 More lenses. Object converging or diverging. (b) the focal distance f, (e) the image distance i. It also refers to whether (d) the image is real or virtual, and (e)on O stands on the central axis of a thin symmetric lens. For this situation (see the table below, all distances are in centimeters), find (a) the lens type, O or on the opposite side. le attempts. Type m R/V /NI Side +12 0.60 NI (b) Number Units (c) Number Units Show Work is REQUIRED for this question: Open Show Work

Explanation / Answer

a) Power p is positive, so focal length f must be positive. Hence is is converging lens.

b) f = 1/P = 1/12 = 0.0833

c) m = 0.6 = -i/o => o = -i/0.6

Using thin lens eqn:

1/f = 1/o + 1/i

=> 1/f = -0.6/i +1/i

=> i = 0.4f = 0.03333

d) Since i is positive, it means image is formed on the other side of the lens, by actual ray meeting.

So, the image is real.

e) On the opposite side

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