Propose a structural formula for compound J, molecular formula C3H6O, consistent withthe following 1H-NMR spectrum.
Chem 107 Microscopy is applicable to every area of forensic science A microscope is an optical instrument that uses a lens or combination of lenses to magnify and resolve fine details of an object The earliest methods for examining physical evidence relied solely on the microscope Various types of microscopes are used to analyze forensic specimens Advantages Sample preparation is often minimal Can be used for separation and identification Nondestructive Versatile Magnification ranges based on the microscope Elemental composition can be determined Comparison microscope can analyze two objects side by side Can be combined with other analytical instruments to extend the instrument’s capabilities The Lens Lens: A translucent material that bends light in a known and predictable manner Most devices that control light have one or more lenses in them Some only use mirrors Resolution: The minimum distance two objects can be separated and still be seen as two objects Focal Length: The distance between the center of the lens and the focus point Two lense types 1. Convex a. Positive lens b. Will converge or focus light and can form an image 2. Concave a. Negative lens b. Diverge light rays Two Types of images 1. Virtual a. An image in which outgoing rays from a point on the object never actually intersect at a point b. Creates an image on the same side of the light source 2. Real