Optical Devices

Optical Devices problem 3

A camera with a focal length of 20 mm is used to take a picture of a car driving perpendicular to the direction of focus of the camera at a speed of 80 km/h. When the car passes, its distance is 10 m from the camera. If the exposure time is 1/100 s, what will be the length of the trace of the car on the film (sensor)?


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