Question
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, so a sharp im age always falls on the film. A camera with a telephoto lens $(f=200.0 \mathrm{~mm})$ is to be focused on an object located first at a distance of $3.5 \mathrm{~m}$ and then at $50.0 \mathrm{~m}$. Over what distance must the lens be movable?
Step 1
Step 1: We start by using the thin lens equation which is given by $\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i}$, where $f$ is the focal length, $d_o$ is the object distance, and $d_i$ is the image distance. Show more…
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To focus a camera on objects at different distances, the converging lens is moved toward or away from the image sensor, so a sharp image always falls on the sensor. A camera with a telephoto lens $(f=200.0 \mathrm{mm})$ is to be focused on an object located first at a distance of 3.5 $\mathrm{m}$ and then at 50.0 $\mathrm{m}$ . Over what distance must the lens be movable?
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, so a sharp image always falls on the film. Acamera with a telephoto lens (f=200.0mm) isto be focused on an object located first at a distance of 3.5m and then at 50.0m. Over what distance must the lens be movable?
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