PPT-Measuring with Microscopes

Measuring with microscopes We can measure the size of objects using an eyepiece graticule This scale is typically 10mm long and is divided into 100 subdivisions The scale on the eyepiece graticule cannot be used directly to measure the size of objects under a microscopes objective lens because each objective lens will magnify to a different degree. The Cost of Living. We need all sorts of things to live. These things are typically not free. So, what’s the cost of living the way we actually live? That is, what’s the cost of buying the things we buy?. The Big Questions. How do we even know cells are even there?. What has advanced our understanding of cells?. Specification Link. Describe how plant and animal cells can be studied in . greater detail . Unit 1 – Intro to Science. Types of Microscopes. Electron Microscope. Uses a beam of electrons to magnify image greater than 1000x (1000 times). Kills observable cells so not used to view live specimens.. Forensic Scientists. Forensic scientists help resolve legal matters through scientific research, analysis and experimentation. . This often involves using microscopes to examine blood and other biological samples, specks of fiber and other materials found at crime scenes and even handwriting.. Optical Microscope. [photograph]. . Retrieved from https://. commons.wikimedia.org. /wiki/File:Optical_microscope_nikon_alphaphot_+.jpg. Microscopes:. Microscopes are some of the most commonly used pieces of lab equipment. - .  the models found in most schools, use compound lenses to magnify objects. The lenses bend or refract light to make the object beneath them appear closer.. Common magnifications: 40x, 100x, 400x. https://www.youtube.com/watch?v=4OpBylwH9DU. . . (6 min). Let’s review…. Cell Theory: 3 . Main Ideas . All . living. things are composed of cells. Cells are the basic units of structure and function in living things. Comparison of relative sizes of molecules, cell membrane thickness, viruses, bacteria, organelles and cells, using the appropriate SI unit.. Size . relationships. of biological and chemical. levels of organization are. Ž†  1590. –first compound microscope. History of the Microscope. 1655 – . Robert Hooke. used a compound microscope to observe pores in . cork.. He called them . “cells”. History of the Microscope. Introduction The applications of microscopy in the forensic sciences are almost limitless. This is due in large measure to the ability of microscopes to detect, resolve and image the smallest items o DEPARTMENT OF MICROBIOLOGY MTN COLLEGE MADURAI. Definition :  An optical instrument that uses a lens or a combination of lenses to produce magnified images of small objects  especially of obje video (link on the website). http://www.youtube.com/watch?v=X-. w98KA8UqU. Warm up . Why would we want to use a microscope to see things? When would it be better to use a telescope or binoculars?. Week 12, Day One. Overview. Cells . are the basic units of structure and function in living things. . What does cell structure mean? . What it is made of and how its parts are put together.. What does cell function mean? .