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Web Activities
UNIT 4 - THE WAVE NATURE OF LIGHT
Chapter 10 - Wave Effects of Light
10.1 Polarization of Light
10.4 Interference in Thin Films
10.5 Applications of Thin Films
10.6 Holography
10.9 Some Applications of Electromagnetic
Waves
Careers
Chapter 10 Review (p. 547)
Chapter 10 - Wave Effect of Light
10.1 Polarization of Light
Section 10.1 Questions (p. 498)
- Using the Internet or other resources, research the liquid crystal
displays (LCDs) common in electronic screens, such as calculator and
digital wristwatch readouts. Write a short report on how LCDs use
polarization.
How
Stuff Works
This popular website takes the reader through a series of pages that
describes how LCDs work. Look at the section that deals specifically
with liquid crystals, light, and electricity.
Corning
Discovery Centre
A great site that has a tutorial on how the LCD panels are created.
You must have the flash plug-in to view this.
Dell - Display Technologies
Gives a bit of a history of display devices but focuses on LCD panels
with some very good diagrams.
10.4 Interference in Thin
Films
Section 10.4 Questions (p. 519)
- The national standards for new home construction may include
thin-film coatings, called "E-coatings," on thermopane
windows for energy conservation. Research this standard, and
find out how E-coatings are used to reduce heat loss in winter
and decrease heat gain in summer. Write a short report on your
findings.
How
Stuff Works
This popular website takes the reader through a series of pages that
describe how smart windows work. Look at the section that deals specifically
with suspended particle devices.
Inert
Gas Window Fills
This site gives a good description of the technology, describes some
areas where it is used, and gives details like pricing and benefits/limitations
of the windows.
EWC:
How Windows Work
Interesting diagrams showing heat loss. This also includes a thermal
performance chart for different window casings.
BobVilla.com
This website, from the creator of popular home improvement shows,
is a less technical description of how Low-E windows work with an
interesting discussion of how they work in low temperature and high
temperature climates.
10.5 Applications of Thin
Films
Section 10.5 Questions (p. 524)
- Research the Internet and other sources and write a short
report in how CDs and DVDs are recorded on a computer. Pay particular
attention to the operation of the laser and its effect on the
recording surface.
How
Stuff Works
This popular website takes the reader through a series of pages
that describe how CDs work. Look at the section that deals specifically
with the CD player and describes the laser involved.
How
Stuff Works
This popular website takes the reader through a series of pages
that describe how DVDs work.
How
Stuff Works
This website looks specifically at the surface of CDs and DVDs
and how data is stored on them.
- Thin-film technology is used in the manufacture of microchips
and microprocessors as a means of measuring the thickness of
the various applied layers. Research this application and write
a short report on your findings.
Semi-conductor
Manufacturing Process
A nice graphic flowchart showing exactly how these chips are created.
Intel
Research
The section on microprocessors demonstrated how different laws of
physics are used to produce their microprocessor chips and different
designs.
LSI
Logic - Resources and More
This is a site actually designed for teachers that has a number of
links to the design of microprocessors and a section that deals with
careers in the industry.
10.6 Holography
Section 10.6 Questions (p. 527)
- The words "hologram" and "holographic"
have some special uses outside physics. Research what historians
mean by "holographic document" and what lawyers mean
by "holographic will," and write a report on your findings.
Holographic
Wills
This is a legal site from Idaho that explains what a holographic
will is.
- Research holographic computer memory and prepare a research
paper on how it might work.
How
Stuff Works
This popular website takes the reader through a series of pages that
describe how holographic memory works. Look at the section that deals
specifically with desktop holographic data storage.
Tweak3D.net
A site dedicated to the different types of holograms. Scroll down
to the section on holographic storage.
How
Stuff Works
This is an interesting technology that is being developed at the same
time as holographic memory. Moth are alternatives to present computer
memory storage.
10.9 Some Applications of
Electromagnetic Waves
Explore an Issue: Cell Phones (p. 538)
Is using a cell phone hazardous to your health?
Research the issue, citing the major studies done over the past
three years. Make a note of the funding for each of the studies
you examine.
- Evaluate the studies based on objective criteria.
- Summarize your findings and indicate to what extent the
evidence objectively supports (or, as the case may be, is currently
insufficient to support) a conclusion.
Section 10.9 Questions (p. 539)
- The heating effect of microwaves was originally noticed
by radar operators and the end of World War II. They found that
they could reheat meals by placing them near the magnetron tubes
generating the microwaves. This discovery eventually led to
the microwave oven. Research the Internet and other sources
and answer the following questions:
- What are the wavelengths of the microwaves used in
household microwave ovens?
- What is their source?
- How do microwaves heat food?
- What types of food cannot be heated in a microwave
oven?
- Draw a labelled diagram showing the construction of
a typical microwaves oven. Comment on the safety features.
- Why was the practice of the radar operators dangerous?
How
Stuff Works
This popular website takes the reader through a single page of information.
It does answer many of the questions that are in the textbook. Make
sure you go to the related links at the bottom.
Discover Exactly how a Microwave Oven Works
This site shows the inside of the microwave and great diagrams of
its construction.
Careers
Practice (p. 543)
- Identify several careers that require knowledge about the
wave nature of light. Select a career you are interested in
from the list you made or from the careers described above.
Imagine that you have been employed in your chosen career for
five years and that you are applying to work on a new project
of interest.
- Describe the project. It should be related to some
of the new things you learned in this unit. Explain how
the concepts from this unit are applied in the project.
- Create a resume listing your credentials and explaining
why you are qualified to work on the project. Include in
your resume:
o your educational background: what university degree or
diploma program you graduated with, which educational institute
you attended, post-graduate training (if any);
- your skills
- your duties in previous positions
- your salary expectations
These sites are major job searching sites for Canada.
Look for careers in the Engineering and Science field.
Chapter 10 Review (p. 547)
- Research the use of polarization as a navigation aid by
spiders. Write a research paper on your findings.
- The vivid iridescence of the peacock, comprising chiefly
blues and greens, is caused by interference of white light upon
reflection in the complex, layered surface of its feathers.
This is called biomimicry.
- Using the Internet and other sources, research biomimicry
and report briefly on hoe this effect is produced in the
peacock feather as well as similar effects seen in grackle
and hummingbird plumage.
- Why are investigators studying iridescent plumage?
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