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A concave cosmetic mirror has a focal length of 36 cm . A 2.0-cm-long mascara brush...

A concave cosmetic mirror has a focal length of 36 cm . A 2.0-cm-long mascara brush is held upright 18 cm from the mirror.

Use ray tracing to determine the location of its image. How far is the image from the mirror? Input positive value if the image is on the same side from the mirror as an object and negative if the image is on the other side.

What is the height of the image? Use ray tracing to determine.

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Answer #1

2cm = he A D hi E D 早. 363 2 +4 cm 36-18 4灯 DE 4- ,36 cm

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