2_Chapter 23 HomeworkCH23 Mirrors and Lenses

2_Chapter 23 HomeworkCH23 Mirrors and Lenses - 268 CHAPTER...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
268 CHAPTER 23 Answers to Even Numbered Conceptual Questions 2. If the finger and the image are at the same distance from you, then they will coincide regardless of what angle you view them from. However, if one is closer than the other, they will appear to coincide only when viewed along the line connecting their positions. When viewed at any angle to this line, the finger and image are seen separately. 4. Chromatic aberration is produced when light passes through a material, as it does when passing through the glass of a lens. A mirror, silvered on its front surface never has light passing through it, so this aberration cannot occur. This is only one of many reasons why large telescopes use mirrors rather than lenses for their primary optical elements. 6. Make the mirror an efficient reflector (shiny); use a parabolic shaped mirror so that it reflects all rays to the image point, even those far from the axis; most important, use a large-diameter mirror in order to collect more solar power.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 10/20/2011.

Ask a homework question - tutors are online