BIO121 exp2 report.docx - Lab Report Experiment 2 The...

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Lab Report Experiment 2: The microscope and its usesPart A: identify the parts of the microscope and its functionsObjective: 1)To study the parts of the compound microscope and its functions. 2)To test the functions of the microscope with specimens provided. Methods: 1.A compound microscope was provided to each pair of the students in the lab. 2.Then the parts of the microscope were observed and identified by the students.3.The functions of the microscope were being used and tested by the students for examine the specimens provided such as euglena, amoeba, paramecium, spirogyra, hydra and pond water. Results: Coarse adjustmentFine adjustment
Discussion: 1.Arm– The arm of the microscope is the support for the body of the equipment. Students should carry this area when handling a microscope. 2.Base– The base of the microscope is the area where students should carry along with the arm to prevent dropping of the microscope. This base is used to give a strong foundation for the entire microscope. 3.Ocular lens (eyepiece)– The ocular lens on the microscope provide 10x magnification of the image that is made by the objective lens. Experimenter would ArmStage Stage manipulator knobsBase Light source Multiple objective lens Ocular lens (eyepiece) Nose piece
adjust it according to their eyes by moving it together or apart to obtain a clear vision for their observation. 4.Objective lens– These objective lenses have 4 degrees of magnification. For the low power which is (10x) gives the smallest image, high power (40x) which shows up a larger image, oil immersion (100x) which shows up the biggest image. And for the smallest objective lens which gives out an even smaller image that is a very low power (4x). The objective lens that used for this experiment is the very low powered objective lens (4x), the low powered objective lens (10x) and the high-powered objective lens (40x). In general, objective lenses are being used from low to high immersion. 5.Nosepiece– Nosepiece is where the objective lenses are attached to and it is used to change the magnification of the objective lens by rotating it. 6.Stage– The stage is where the specimen (glass slide) is being placed. This stage comprises of stage clips that is used to hold the specimen and a hole where the lights can pass through from the light source. While adjusting the stage, make sure that the specimen is centralised to get a clear image for the observation.

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