This syndrome, known as sudden sniffing death, can result from a single session of inhalant use by an otherwise healthy young person. Sudden sniffing death is associated particularly with the abuse of butane, propane, and chemicals in aerosols. Inhalant abuse also can cause death byâ. asphyxiation â from repeated inhalations that lead to high concentrations of inhaled fumes, which displace available oxygen in the lungs;
The biggest difference is that a reflecting telescope uses a mirror to collect and focus the light and a refracting telescope uses lenses for the same purpose. A reflecting â¦ telescope has a concave mirror at the bottom end that reflects the image up to the eyepiece.
An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.sing an example of an amateur telescope such as a Newtonian telescope with an aperture of 130 mm (5) and focal length of 650mm (25.5), we use an eyepiece with a focal length of 8 mm and apparent field of view of 52Â°.