Saran's Learn Microbiology

  Difference between Simple and Compound Microscope S. No Simple Microscope Compound or Light Microscope 1 Invented and designed by Anton Van Leeuwenhoek in 1670. Designed by Hans and Zacharias Janssen in 1950. 2 Uses One lens (Ocular lens) to magnify objects. Uses Two lenses to magnify objects (Ocular lens and an Objective lens). 3 Structure - Stand is small, hollow cylindrical attached to the base and is used to hold the microscope. Structure - Arm is curved and is used to hold the microscope. 4 Contains single eye piece Contains single eye piece or double eye piece. 5 Light source is natural Light source is Natural and sometimes Illuminator is a source of light 6 Mirror is Concave - Reflecting type. Mirror is plane at one side and Concave at other s...

 

Binocular Light Microscope ·        Illuminator - This is the light source located below the specimen. ·        Condenser - Focuses the light through the specimen. ·        Stage - The platform that holds the specimen. ·        Stage Clips – Hold the slide in place. ·        Objective Lens - The lens that is directly above the stage. ·        Nose Piece - The portion of the body that holds the objectives over the stage. ·        Field Diaphragm­ - Controls the amount of light into the condenser. ·        Base - Bottom of the microscope. ·        Coarse Focusing Knob - Used to make relatively wide focusing adjustments to the microscope. ·      ...

 

  MICROSCOPY ·                       Microscopy is the technical field of using microscopes to view samples and objects that cannot be seen with the unaided eye (objects that are not within the resolution range of the normal eye).  A microscope is an optical instrument that magnifies objects otherwise too small to be seen, producing an image in which the object appears larger.  A microscope uses a lens or a combination of lenses to produce highly magnified images of small specimens or objects especially when they are too small to be seen by the naked eye. A light source is used to make it easier to see the subject matter.   Most photographs of cells are taken using a microscope, and these pictures can also be called Micrographs.  Three parameters are especially important in microscopy: Magnification, Resolving power and Numerical aperture. i) Magnification ·     ...