Question

task #1: how to use a compound microscope. video link: https://www.youtube.com/watch?v=ndgfhaswvzg (5:51) length of video 1. the lowest power lens (red) is called the ____ lens with a magnification of 4x. next is the __ lens (yellow) with a magnification of 10x. last is the __ lens (blue) with a magnification of 40x. 2. the condenser lens allows you focus light to a point where __. 3. describe the coarse focus knob: __ how much does it move the stage? __ describe the fine focus knob: __ how much does it move the stage? __ 4. when you first put a slide on the stage, what lens and knob do you start with? __. then, with subsequent lenses, only use the __ knob. 5. what does the stage clip do and why is it important? explain: __ 6. where are the knobs located that allow you to move your slide forward and backwards and left and right? __ 7. once again, state what focus knob you use with the 3 different power of lenses: scanning lens = __ focus knob low power lens = __ focus knob; high power lens = __ focus knob 8. what is the magnification of the last view he looks at under the microscope? ____

Explanation:

1. The lowest - power lens in a compound microscope is the scanning lens, followed by low - power and high - power lenses.
2. The condenser lens focuses light onto the specimen.
3. The coarse focus knob moves the stage up and down in large increments, while the fine focus knob moves it in small increments for sharp focusing.
4. Start with the scanning lens and coarse focus knob, then use the fine focus knob with other lenses.
5. The stage clip holds the slide in place to prevent movement during observation.
6. Knobs for moving the slide are usually on the stage or near it.
7. Use the coarse focus knob with the scanning lens, coarse or fine with low - power lens, and fine with high - power lens.
8. Magnification is determined by the combination of objective and eyepiece lenses.

Answer:

1. scanning; low - power; high - power
2. the specimen is located
3. Moves stage in large increments; Large movement; Moves stage in small increments; Small movement
4. Scanning lens; Coarse focus; Fine focus
5. Holds the slide in place; To prevent slide movement during observation
6. Usually on the stage or near it
7. Coarse; Coarse or Fine; Fine
8. Depends on objective and eyepiece lens combination (if eyepiece is 10X and high - power objective is 40X, magnification is 400X)