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A wildlife photographer with a 350 mm focal-length telephoto lens on his camera, is taking a...

A wildlife photographer with a 350 mm focal-length telephoto lens on his camera, is taking a picture of a hippopotamus that is 1.6 m tall, and 180 m away. Suddenly, the hippo starts charging straight toward the photographer at speed 4 m/s. Please show all your steps for the following questions.

a) What is the speed, in mm/s of the image of the hippopotamus?

b) What is the image distance, magnification, and orientation of the image, at the instant the hippopotamus is at a distance of 100 m from the lens?

[Hint: use the mirror equation and the magnification equation to answer this question].

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