A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100

Question

A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100 cm focal length. Where is the image formed? 80 cm behind the mirror 25 cm behind the mirror 17 cm behind the mirror 17 cm in front of the mirror 25 cm in front of the mirror A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100 cm focal length. What is the size of the image formed? 5.0 cm 7.2 cm 7.5 cm 30 cm 12 cm A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100 cm focal length. Which of the following describes the image? real and inverted real and upright virtual and inverted virtual and upright not possible to determine

Explanation / Answer

4) Given that f = -100 cm

object distance is do = 20 cm

object height is ho = 6 cm

using mirror equation

1/f = (1/do)+(1/di)

-1/100 = (1/20)+(1/di)

di= -16.67 cm = -17 cm

negative sign shows that image is formed behind the mirror

5) magniication is m = -di/do = hi/ho

17/20 = hi/6

hi= 5.1 cm = 5 cm

6) virtual and upright

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