Light - Assignment 3

The three assignments will be assessed through an
open book quiz on Monday
1. Short Answer:
 To find answers to these questions, visit the online journey through astronomy. I would ask you to read through the page first, then go back and answer the questions afterwards. I think you will find some of this very interesting.
 
 

A) What is included in the electromagnetic spectrum?
B) What is the relative speed between different components of the electromagnetic spectrum?
C) According the Theory of Relativity, what is the fastest any object can travel in a vacuum?
D) Does light need a medium in order to be transmitted?
E) Is light effected by the medium in which it is traveling?
F) What is a light year?
G) Knowing that in a vacuum one light year is the equivalent of 9.46x1017 cm, use dimensional analysis to determine the speed of light in m/s.
H) From the value given on the website, determine your distance to the sun in kilometers.


2. 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: - Interface - Ray - Incident Ray
    - Point of Incidence - Normal - Reflected Ray
    - Angle of Incidence - Angle of Reflection - Specular/Regular Reflection
    - Diffuse Reflection - Indirect Lighting - Direct Lighting
     
  Definitions: - The angle between the incident ray and the normal.
    - The angle between the reflected ray and the normal.
    - Parallel incident rays that are reflected in various directions from a rough surface.
    - Light travels straight toward an object or surface that produces sharp shadows.
    - Light that reflects off one or more rough surfaces resulting in few or soft shadows. This is sometimes called soft/diffuse lighting.
    - A ray approaching a surface.
    - The boundary between the two mediums.
    - A imaginary line constructed perpendicular (90o) to the surface at the point of incidence.
    - The point where the incident ray meets the surface of the object.
    - A hypothetical line used to represent the path of a single stream of light.
    - The ray (or portion there of) that leaves/reflects a surface at the point of incidence.
    - Parallel incident rays that are reflected parallel from a smooth surface.

3. Copy and Label the Following Diagram:
Include angle of refraction, angle of incidence, angle of reflection, incident ray, reflected ray, refracted ray, and normal.


 

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