Warming up on optics

This assignment is due before 9 AM, Wednesday, November 29th, 2000.

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The following three questions refer to the material you were to read in preparation to the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT HOMEWORK button at the bottom of this page.

WarmUp questions are worth 5 points each towards your "Homework and Web Assignments" score (250 points total).




1.

Please explain in your own words what a focal point is. Try to do this without refering to any particular mirror or lens.



2.

If you have a "makeup mirror" (also known as a magnifying mirror) at home, please try the following experiment. Look at yourself as you slowly back up from the mirror. If you have enough room, you should see your reflection get larger, then go "crazy", then return to focus upside down. the "crazy" transition usually occurs when you are about two meters from the mirror. Please estimate the focal length of the mirror from this data or from your own experience.





3.


The focal length of a regular flat mirror is

Undefined

Zero

1 meter

Infinite

It depends on the size of the mirror

Below is a space for your thoughts, including general comments about today's assignment. What was hard or confusing (or cool)? What would you like to spend extra time on in class? Do you see how this subject fits in with the others we have discussed?




You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.

I received no help from anyone on this assignment.



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