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.
CH 03 pp64-94 6/5/02 12:06 PM Page 72 72 Chapter 3 Light and Telescopes IGURE 3-10 Essentials of a Refracting Telescope A refracting telescope consists of a large, long-focal-length objective lens that collects and focuses light rays and a small, short-focal-length eyepiece lens that restraightens the light rays.