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.
If the focal ratio of your telescope is not printed on the telescope, you can determine it by dividing the focal length by the aperture. If you have a 762mm focal length and an aperture of 6 (152.4mm) then 762 / 152.4 = 5 or f/5 focal ratio. telescope's ability to gather light is dependent on: Aperture ... the larger the primary optics (the largest lens or mirror) the more light is captured. Optical quality ... the more reflective a mirror and the more a lens allows light to pass through it, the more light is transmitted to your eye.