![Amazon.com: Omegon AC 90/1000 EQ-2 Refractor Telescope with 90mm Aperture and 1000mm Focal Length : Electronics Amazon.com: Omegon AC 90/1000 EQ-2 Refractor Telescope with 90mm Aperture and 1000mm Focal Length : Electronics](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/61O514PCwHL._AC_UF350,350_QL80_.jpg)
Amazon.com: Omegon AC 90/1000 EQ-2 Refractor Telescope with 90mm Aperture and 1000mm Focal Length : Electronics
![What focal length should the reading spectacles have for a person for whom the least distance of distinct vision is 50 cm ? What focal length should the reading spectacles have for a person for whom the least distance of distinct vision is 50 cm ?](https://dwes9vv9u0550.cloudfront.net/images/9984728/01c4fce7-8327-4df0-a818-3de8ab2dc968.jpg)
What focal length should the reading spectacles have for a person for whom the least distance of distinct vision is 50 cm ?
![Amazon.com: Omegon AC 90/1000 EQ-2 Refractor Telescope with 90mm Aperture and 1000mm Focal Length : Electronics Amazon.com: Omegon AC 90/1000 EQ-2 Refractor Telescope with 90mm Aperture and 1000mm Focal Length : Electronics](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/619Ce5iBFVL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Omegon AC 90/1000 EQ-2 Refractor Telescope with 90mm Aperture and 1000mm Focal Length : Electronics
![SOLVED:An old refracting telescope placed in a museum as an exhibit is 55 cm long and has magnification of 45 . What are the focal lengths of its objective and eyepiece lenses? SOLVED:An old refracting telescope placed in a museum as an exhibit is 55 cm long and has magnification of 45 . What are the focal lengths of its objective and eyepiece lenses?](https://cdn.numerade.com/previews/429d4d51-1191-42a6-8f44-a071fc6031f7.gif)
SOLVED:An old refracting telescope placed in a museum as an exhibit is 55 cm long and has magnification of 45 . What are the focal lengths of its objective and eyepiece lenses?
![Social Responsibility Practice of the Evolving Nature in the Sustainable Development of Arctic Maritime Operations | SpringerLink Social Responsibility Practice of the Evolving Nature in the Sustainable Development of Arctic Maritime Operations | SpringerLink](https://media.springernature.com/lw685/springer-static/image/chp%3A10.1007%2F978-3-030-28404-6_6/MediaObjects/476124_1_En_6_Fig2_HTML.png)