1. Match the Following Words with the Appropriate
Definition:
To find a definition on the web, go to
www.google.ca
and type in the word (or phrase in quotes) and add the word definition at
the end, this will access the online dictionary.
|
Words: |
-
Luminous |
-
Beam |
-
Transparent |
| |
-
Nonluminous |
-
Incandescence |
-
Translucent |
| |
-
Rectilinear Propagation |
- Ray |
-
Opaque |
| |
-
Penumbra |
-
Umbra |
-
Eclipse |
| |
-
Light |
-
Reflection |
-
Refraction |
|
Definitions: |
- Radiant energy that the
eye can detect. |
| |
- An object that produces
light, they are seen by their own light. |
| |
- An object that does not
produce light, it is seen by the light it reflects. |
| |
- Term used to describe
the fact unobstructed light appears to travel in a straight
line. |
| |
- The changing of light's
direction as it rebounds from a shiny surface. |
| |
- The changing of light's
direction as it enters a new medium at an angle other
than 90o |
| |
- A combination of
several light rays. |
| |
- A shadow formed from a
moon or planet blocking the light from the sun. |
| |
- A partial shadow |
| |
- Objects that allow some
light to pass through but diffuse/scatter in the process, a
clear image is not visible through this object. |
| |
- A hypothetical line
used to represent a single stream of light showing the path
of light, but do not exist in nature. |
| |
- A total shadow |
| |
- Objects that allow
light to pass through them so a clear image is visible. |
| |
- A body (object) that
emits light after being heated. |
| |
- An object or material
that does not allow light to pass through. |
2. Short
Answer Questions
To find
the answer to these questions, it is suggested that you logon to
www.google.ca
and search the phrase in quotations.
The first couple have had suggested titles provided for you. Note that you
may not have to do a search, the definition you have
found may be detailed enough for you to answer the question.
2.a) Find 3 examples of luminous objects.
suggested search "examples of luminous objects are"
b) Find 3 examples of nonluminous objects.
since the search "examples of nonluminous objects are"
does not yield any results, we may try to broaden our search
to something simple like "nonluminous objects" or
examples "nonluminous objects"
3. a) Find an example of a transparent
object.
b) Find an example of a translucent object.
c) Find an example of an opaque object.
4. Describe the "inverse square law" and
explain how it can be applied to light by visiting the Internet address
http://hyperphysics.phy-astr.gsu.edu/hbase/vision/isql.html#c1.
5. Using the inverse square law,
determine how much brighter the overhead appears to someone at the front of
the class (5m from the screen) then someone
at the back of the room (10m from the screen).
6. Find, or create, a graphic that
illustrates the eclipse, penumbra, and umbra. |