Introduction
We have learned that refraction occurs as light passes across the boundary between two media. Refraction is merely one of several possible boundary behaviors by which a light wave could behave when it encounters a new medium or an obstacle in its path.
Task
To prepare for this, you will need to review some topics in refraction of light. You will do the task from the teachers page. These tasks will require a computer, access to the web, paper and pencil.
Process
Be sure to read through all of the directions in each section before you click and follow the links and instructions.
Evaluation
1. learn about refraction of light from techer`s page;
2. Do the task;
3.Check the answers.
Conclusion
Congratulations! You have learned about reflaction of light.
Teacher Page
http://sciencelearn.org.nz/Contexts/Light-and-Sight/Science-Ideas-and-Concepts/Refraction-of-light
Task:
1. What is refraction?
2.How does the light travels?
3.What mean if the amount of bending depends on change in speed?
4.What mean if the amount of bending depends on angle of the incident ray?
5.What is air refractive index?
6.What is density?
7.What creates dispersion?
8.This line is drawn as a dotted line and is called the normal. How many degrees this line has?
9.Which is the 1. substance?
10.Does two different substances can have the same refractive index?
Answers
1. The bending of light as it passes from one transparent substance into another.
2.light always travels in a straight lines?
3.if a substance causes the light to speed up or slow down more, it will refract (bend) more.
4.if the light is entering the substance at a greater angle, the amount of refraction will also be more noticeable.
5.2,4
6.Density describes how tightly a certain amount of matter (atoms or molecules) of a substance is compacted in a given volume.
7.The fact that the index of refraction depends on the frequency of the light n=n(f).
8. 90.
9.Substance where the light start traveling.
10.Yes