This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Create assignment, 00224, Homework 10, Apr 22 at 7:03 am 1 This printout should have 9 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. The due time is Central time. Vertical Flat Mirror 36:02, trigonometry, numeric, > 1 min, nor mal. 001 Hint: A ray diagram would be helpful. Determine the minimum height of a vertical flat mirror in which a person 70 in . in height can see his or her full image. Correct answer: 35 in . . Explanation: In the figure, the mirror is labeled AB . A ray from the womans foot F strikes the bottom of the mirror at B , with an angle equal to and proceeds to the womans eye. L C D A B E T F M The two right triangles EBM and FBM are identical, since they share the common side MB and angle . Therefore EM = MF = 1 2 EF which is also the distance BC . Similarly, a ray from the top of the womans head T strikes the top of the mirror at A and proceeds to her eye. The same line of reasoning as above leads to the conclusion that DA = 1 2 TE Thus the length AB of the mirror is 1 2 ( TE + EF ), which is one half the womans height. Note that the mirrors bottom edge must be exactly 1 2 EF from the floor for a fullheight image to be possible. Note also that the conclusions reached here are valid regardless of how far she stands from the mirror. keywords: Spherical Mirror A 02 36:05, highSchool, numeric, > 1 min, wording variable. 002 A convex spherical mirror has a radius of curvature of 30 . 6 cm . The object distance is 14 cm ....
View
Full
Document
 Spring '10
 Avram
 Physics, Work

Click to edit the document details