Question

Item 2 A photographer focuses his camera on his subject. The subject then moves closer to the camera. Part A To refocus, should the lens be moved closer to or farther from the detector? Explain. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. The object distance, image distance, and focal length are related by We see that if s gets smaller and f doesn't change, the only way the equality will hold is for s' If s' gets ___________ , the distance between the lens and the image gets larger. Since the detector case can't be moved, the only solution is to move the lens ____________ the detector.

Answer 1

Here as the subject is moved closer to the camera the object distance decreases. As the object distance is decreased the image distance should increase. So in order to refocus lens should be moved farther away from the detector The object distance, image distance and focal length is related by s s' j We see that if s gets smaller and f doesn't change only way the equality will hold is that s' to get larger If s' gets larger the distance between the lens and the image gets larger. Since the detector case can'tbe moved, the only solution is to move the lens farther from detector