chunkymonkeyw6030 chunkymonkeyw6030

21-09-2019
Physics

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An object is placed a distance of 20 cm from a convex mirror of radius 40 cm. How far (in cm) is the image from the mirror?

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pgwestbrook01 pgwestbrook01

21-09-2019

Answer:

Be sure you understand two optics principles: the focal length of a convex mirror is NEGATIVE (by convention) and R / 2 = f.

Find f, take its negative, plug in the mirror equation and obtain Di = - 24 cm. This indicates that the image is virtual (as it should be in a convex mirror), is erect (as all virtual images are), is diminished (as it should be) and INSIDE the mirror as it should be.

Explanation:

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