Answer all parts for 100% feedback !!! (5%) Problem 13: An object is located a d

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Answer all parts for 100% feedback !!!

(5%) Problem 13: An object is located a distance do-7.6 cm in front of a concave mirror with a radius of curvature r = 24.1 cm. 33% Part (a) Write an expression for the image distance, di Grade Summary Deductions Potential 0% 100% Submissions ts remaining:5 (5% per attempt) detailed view DELI CLEAR Submit Hint I give up! Hints: 2% deducti on per hint. Hints remaining: 2 Feedback: 2% deduction per feedback. là 33% Part (b) Numerically, what is the image distance, ai, in centimeters? 33% Part (c) Is this a real or virtual image?

Explanation / Answer

Given,

r = radius of curvature = 24.1 cm = 0.241 m

f = focal length = r/2 = 0.241/2 = 0.1205 m

do = object distance = 7.6 cm = 0.076 m

di = image distance

a)using the lens equation

1/f = 1/do + 1/di

di = f do / (do - f)

b)

di = (0.1205) (0.076) / (0.076 - 0.1205) = -20.58 cm

c) Since object distance is less than the focal length of mirror, it is virtual image.

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