Opiates such as morphine sulfate stay in the system for about 72  hours. If a person has a high metabolism and is not a regular user  of the drug it could take at little as â¦48 hours for the morphine to  leave the system.
A convex mirror produces a virtual image, because the principle light rays incident on the mirror surface from the object must pass through the focal point on the other side oâ¦f the mirror (virtually), and so the image appears at a depth behind the mirror's surface.
A reflecting telescope, aka reflector, or a refracting telescope, aka refractor, both use something called an objective, a lens or mirror that focuses light. The plane where the objective of a telescope forms (or focuses) an image is known as the focal plane, while the distance from a lens or mirror to its focal point is called the focal length of that lens or mirror.