Warm-Up Exercise 28

Due 10:00 am, Fri, Mar. 9

Physics 123, Winter Semester, 2012

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Did you carefully complete the reading assignment?
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While decorating your Christmas tree you notice that you can see yourself in one of the spherical, reflective ornaments. Is your image real or virtual? How do you know?

As you stand some distance from the bathroom mirror preening, you notice that your roommate got water spots all over the mirror. Can you focus on your hair and the water spots at the same time? Why or why not?

When you use your rear-view mirror in the night setting, is the light hitting your eye coming from the front of the glass or from the back of the mirror? (Try not to look in your book to figure this out.)


Consider the two cases above. Are the images real, or virtual? How do you know?

Was there anything that you didn't understand in the reading assignment? If so, explain.

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