Problem 6 You are in a nightmare in which you are in a slow?moving truck being c

Question

Problem 6 You are in a nightmare in which you are in a slow?moving truck being chased by a dinosaur in that infamous scene from Jurassic Park. However, you did have the presence of mind to have installed a flat rear?view mirror so as to get an accurate impression of the distance of things chasing you. This mirror is 180. 0 m tall and is 0. 8000 m from your eyes when you are driving. If the image of the dinosaur is just filling the mirror vertically, what is the distance of the dinosaur from your mirror in meters) if the dinosaur is, in fact, 17. 00 m tall.

Explanation / Answer

image size or mirror size = 180 mm

screen distance = 0.8 m

size of object = 17 m

magnification = di/do = hi/ho

0.8/do = 0.18/17

do = 17*0.8/0.18 = 75.56 m

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