A concave cosmetic mirror has a focal length of 40 cm. A
Chapter 18, Problem 23P(choose chapter or problem)
Problem 23P
A concave cosmetic mirror has a focal length of 40 cm. A 5-cm-long mascara brush is held upright 20 cm from the mirror. Use ray tracing to determine the location and height of its image. Is the image upright or inverted? Is it real or virtual?
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