The Microscope Exercise 1 3 9 Exercise A
- Slides: 8
The Microscope Exercise 1: 3 -9
Exercise A: Compound Light Microscope http: //www. cas. muohio. edu/mbi-ws/microscopes/compoundscope. html
Exercise A: Compound Light Microscope • Our microscopes have 3 -4 objectives • Each objective has the magnification power engraved on the side: • 3. 5 x or 4. 5: scanning objective • 10 x: low power objective • 40 x: high power objective • 100 x: oil immersion objective Take a slide from your box and test the magnification for each objective. You should have oil immersion in your table
Exercise A: Compound Light Microscope • To focus use first the: • Coarse-adjustment knob using the low power objective only! • Then switch objective and focus using the find-adjustment knob • These microscopes are parafocal which means that the image states in place from one objective to the other. Take a slide from your box and test the magnification for each objective. You should have oil immersion in your table
Exercise A: Compound Light Microscope WHAT IS THE MAGNIFICATION OF YOUR OBJECTIVES? If your ocular is 10 x and the objective is 3. 5 X the magnification es: 10 x 3. 5=17. 5 • Calculate the magnification for: • Scanning lens • Low-power lens • High-power lens • Oil-immersion lens
Exercise A: Compound Light Microscope • Find the diaphragm: regulates the light Using the same slide open and close the diaphragm to regulate the light.
Exercise A: Compound Light Microscope ALWAYS take care of your assigned microscope by: • Grab it by the arm. • Cleaning the lenses using the cleaning lens paper. Never use alcohol! • When done, put the microscope in ‘resting position’. YOU ARE RESPONSIBLE FOR YOUR MICROSCOPE ANY THING THAT HAPPENS YOU NEED TO REPORTED. IF BREAKS IN YOUR WATCH YOU PAID FOR IT $800!
Exercise B: Dissecting Microscope There are several dissecting microscopes in your table • This scope is to see larger things e. g. scale of a fish, the skin of a shark, the eye of an insect.
