physics7c-fall00-mt1-Lee-exam

physics7c-fall00-mt1-Lee-exam - E Physics 7C Fall 2000...

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Unformatted text preview: E. Physics 7C, Fall 2000, Section 1 . , Instructor: Adrian Lee First Midterm Examination, Monday October 2 Name: ———________ Student ID: M— Discussion Section Number/Time/T A: Please write on the paper provided. You can write on both sides of the page. You may use one 8.5 " x 11" sheet of double—sided notes. Score Problem 1 (40 pts) Problem 2 (40 pts) Problem 3 (40 pts) 1(0ch lpu7;% :. 56% Consider only the mirror a) Do a ray tracing. Is the image real or Virtual? (10 pts) b) What is the image distance i? (5 pts) c) What is the image height? (5 pts) Consider the lens and the mirror. All questions refer to light that reﬂects from the mirror once and is refracted by the lens once. d) Do a ray tracing. Is the image real or virtual? (10 pts) e) What is the image distance i? (referred to lens) (5 pts) 0 What are 1'1 and r2 for the lens? (|r1| = |r2|) (5 pts) {ocuﬂ/ﬁq/‘z; 55-00114 Focal? gayﬂ 7 (0 CIA/L Draw a ray diagram for an object at inﬁnity to the left and the ﬁnal image at inﬁnity to the right (suitable for the eye) (10 pts) What is d? (10 pts) Derive the angular magniﬁcation of the system. (10 pts) If the eyepiece was replaced with a concave lens with focal length = -10 cm, what does d have to be to have the resulting ﬁnal image at inﬁnity? (a ray diagram may help) (10 pts) / we fé/zhm; OZ (f/ﬂ! am/ a) A ﬂat piece of glass with n = 1.5 is placed over a ﬂat piece of plastic with n = 1.2. They touch at the left edge and are separated by d on the light edge. Light with wavelength 600 nm is incident nor- mally from above. Given the drawing of the dark fringes above, what is the value for d? (25 pts) b) If the gap is ﬁlled with water with n = 1.33, how many dark fringes appear? (15 pts) ...
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