InterviewSolution
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InterviewSolution
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Photographs of the ground are taken from an aircraft at an altitude of 2000 m by a camera with a lens of focal length 0.50m. The size of the film in the camera is 0.18m xx 0.18m. What area of the ground can be photographed by this camera in a single shot? |
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Answer» Solution :`-U=2000m "" F=0.50m` Size of the image`0.18m xx 0.18m` Using the formula, `(1)/(f)=(1)/(V)-(1)/(u)` We get,`(1)/(0.50)=(1)/(v)+(1)/(2000), v=0.50m` `THEREFORE` Image will be formed at the focus. `m=(v)/(u)=(0.5)/(2000)=0.00025` `therefore ` Size of the object on the ground will COVER an area of`(0.18)/(0.00025)xx(0.18m)/(0.00025)` i.e., Area on the ground`=720m xx 720m`. |
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