exam2soln - Physics 262 - exam#2 1. (25pts) Answer the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 262 - exam#2 3/9 1. (25pts) Answer the following questions. Justify your answers. (Use the space provided below and the next page) a). (9pts) An object (an arrow) is placed as shown in front of each of the following optical instruments. Describe the image produced in each of the following three cases according to the following three sets of identifiers: real/virtual, upright/inverted, and larger/smaller? b). (6pts) The graph on the right is the intensity distribution from a Young’s double-slit experiment. Every 4 th interference peaks are observed to be missing from the pattern. If the width for both slits is known, a = 20.0 m, what is the separation between the two slits d . c). (6pts) i. With a real object, can a convex mirror produce a real image? ii.With a real object, can a diverging lens produce an inverted image? d). (9pts) A real object is placed in front of a convex mirror. If one wants to have a bigger image, should one move the object closer to or farther away from the mirror? Answers: a) i) virtual, upright, and smaller ii) real, inverted, and larger iii) virtual, upright, and larger b) The interference maxs are given by sin dm  and the diffraction mins (envelope) are given by sin ' am . We are told that every 4 th interference maxs are missing from the pattern and this means that every 4 th interference maxs are located at the same angular location as the diffraction mins. This implies that / ' 4 mm . Putting this condition into the two equations, we can see that 44 4 2 0 8 0 ' da m m    c) i. No. For a real object, all images from a convex mirror are virtual.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/10/2010 for the course PHYSICS 262 taught by Professor Paulso during the Spring '10 term at George Mason.

Page1 / 6

exam2soln - Physics 262 - exam#2 1. (25pts) Answer the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online