Problem:
While viewing a slide of bacteria, you change to a total magnification of 1000×, and you find that you cannot bring the image into clear focus and that the image is dark, with low contrast. Which of the following represents something you should check? Select all that apply. Need Assignment Help?
Check that the 100× lens is touching the immersion oil
Check that you added immersion oil
Adjust the iris diaphragm to increase the contrast
Check that revolving nosepiece has the 10× lens locked into correct position