Microscope Questions - Moving Specimens & Light Intensity

[cherrypie]

I need guidance on these questions, on microscopes

Homework Statement

In what direction will you move a centrally positioned specimen on a slide in order to view the top right hand corner of the specimen

2. The attempt at a solution
is it to right then up ? someone please confirm this

2. Homework Statement

what happens to the light intensity when you change to high power from low power? How can you correct this?

2. The attempt at a solution
Not sure.

Thank you.

 

[lkh1986]

I know that if you want to look at the left side of the slide, you need to move it to the right and vice versa. But I have no idea about the top-down couple though.

 

[Ouabache]

The way I would work out this question is by going to the lab, make a slide of something (a drop of water from a pond is fine), put a cover slip over it and try to focus onto it, using the lowest magnification (smallest objective lens). Note approximately where you are over the coverslip and try to move to the top right hand corner. There should be a knob for side-to-side motion and another for up-down motion. Check every so often, to see if you are moving closer to that position.

To investigate your next question I would do the following.. Once I have the slide in focus, I would switch to next higher magnification (objective lens) and refocus and see if I notice any difference in light intensity. If not, go to the next highest magnification.