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18. a telescope has objective of focal length 200 cm and eye piece with f=2cm .if its used to see a 50 m tall building at a distance of 2km ,what is height of image of the building formed by objective lens ? 1.1ccm 2.10 cm 3.5 cm 4.2 cm |
| Answer» 18. a telescope has objective of focal length 200 cm and eye piece with f=2cm .if its used to see a 50 m tall building at a distance of 2km ,what is height of image of the building formed by objective lens ? 1.1ccm 2.10 cm 3.5 cm 4.2 cm | |