Chapter 2 Lecture Notes Flashcards
Visible light consists of ____________ waves that behave like other waves.
Electromagnetic
Light waves interact with materials by being ________, absorbed, or transmitted.
Reflected
Define reflection
Occurs when a wave bounces off of a material
Define absorbance
Occurs when a material captures the energy of a light wave
Define transmission
Occurs when a wave travels through a material
Define refraction
Occurs when a light wave changes direction as they Emeterio a new medium
Define refractive index
The extent to which a material slows transmission speed relative to empty space
What type of microscopes use light to visualize images?
Light microscopes
What are examples of light microscopy?
brightfield microscopes, darkfield microscopes, phase-contrast microscopes,
fluorescence microscopes, confocal scanning laser microscopes
What is a compound microscope? How to calculate total magnification of a compound
microscope that contain an ocular lens and objective lenses?
A compound microscope has two or more lenses. To calculate total magnification the formula is object magnification x ocular magnification.
Which type of microscopy provide the highest level of magnification? List 2 types of this
microscopy?
Electron Microscopy and Transmission electron microscope
Which type of charge are the cells’ cell walls? Which type of dye is used to stain the microbial
cells?
Negative charge the type of dye used is basic dyes.
