Chapter 7: Section 7.1 MICROSCOPES MOST IMPORTANT TOOL OF THE LABORATORY FOR STUDYING MICROORGANISMS TERMS • Magnification – • Resolution – • Contrast — PRINCIPLES OF LIGHT MICROSCOPY • Magnification Microscope has magnifying lenses Called compound microscope • Lens include Ocular lens (eyepiece) and objective lens Lenses combine to objects • Magnification is equal to: multiplying the ocular lens ( ) x the ex: 10x X 100x = 1,000x EFFECT OF MAGNIFICATION PRINCIPLES OF LIGHT MICROSCOPY • Resolution • Resolving power determines how much can be seen » Resolution is enhanced with lenses of higher magnification (100x) TYPES OF MICROSCOPES COMPOUND LIGHT MICROSCOPE • Light Microscopy Light passes through specimen, then through series of magnifying lenses Most common and easiest to use is the microscope