Flashcards
20 flashcards on unit 2.1 by farouk
Cards in this deck (20)
- 1explain 1 difference between light microscopes and electron microscopeswith electron microscopes they do not use light,instead they use beams of tiny particles called electrons and they are more powerful
- 2what are the two types of electron microscopes?1.transmission electron microscope
2.scanning electron microscope - 3in your own words explain what a specimen is ?a specimen is the object/item/creature that is being magnified under a microscope
- 4which direction will the specimen move if you move it to the left under a stereo microscope?the same way, left
- 5which direction will the specimen move if moved down under a light microscope(monocular,binocular)?it will move up ,in the opposite direction
- 6what is the difference between monocular and binocular microscopes?monocular has one eyepiece to look through, binocular has two
- 7in which part of a microscope is the specimen placed?the stage
- 8what is the definition of image?image is all that you see through a eyepiece or microscope
- 9what is the field of view?the field of view is what you see or how much you see of the whole specimen through a microscope
- 10what is a micrometer?a micrometer is a length that is a thousandth of a millimeter ,often used by scientists
- 11what is the maximum magnification for a light microscope?x 1000 meaning a thousand times bigger
- 12what is the maximum magnification for a stereo microscope?x100 ,a hundred times bigger
- 13calculate the following .. if ocular lens magnification is x 5 and objective lens is x 5 what is the total magnification?x 5 times 5 = x 25
- 14if ocular lens magnification is x2 and objective lens is x5 what is the total magnification?x2 x 5 = x10
- 15when magnification increases what happens to the field of view?the field of view gets smaller
- 16which microscope provides a 3 dimensional view of the specimen?the stereo microscope
- 17which microscopes provide a view of the inner structure of specimen such as cells?light microscopes and TEMs
- 18what is another name given for the stereo microscope ?the dissecting microscope
- 19which part of a microscope is used to focus the image on low power?the coarse focus knob
- 20what does the fine focus knob do?it is used to focus the image on high power