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(10%) Problem 7: Two lenses are mounted d = 31 cm apart on an optical bench. The focal length of the first lens is = 9.6 cm and that of the second lens isf2-4.9 cm. An object of height ho-4.9 cm is placed at a distance of do-21 cm in front of the first lens ** 25% Part (a) Ignoring the second lens for now, at what distance, in centimeters behind the first lens is the objects image formed by that lens? Grade Summary Deductions Potential di 8% 92% sin tanO Submissions Attempts remaining: 1 (4% per attempt) detailed view 78 9 cotanO asin0 acos0 atan) acotan) sinh(0 coshOtanh) cotanhO Degrees O Radians 4% 4% 0 END CLEAR Submit I give up! Hints: 4% deduction per hint. Hints remaining: Feedback: 5% deduction per feedback 25% Part (b) Calculate the magnification of that image, including its sign 25% Part (c) Which choice best describes that image? Ε Δ 25% Part (d) Now consider the two-lens system and the final image it forms, ie., the image created by the second lens. What is the distance, in centimeters, between the object and its final image?

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Answer #1

Using lens maker formula

d: 31 c 9.6 m 役: 4.9 cm h.-4.9 m d° 21 cm do di 9. 6 21 d o7. 68 Cm cli dl 216. & 42 Real, Dimi nshad and inverted ith second Ser 13.3138 l di 7.753 cm

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