15. When focusing a specimen, you should always start with the _____________ objective.16. When using the high-power objective, only the _______________ knob should be used.17. The type of microscope used in most science classes is the ______________ microscope.18. You should carry the microscope by the ____________ and the ______________.19. The objectives are attached to what part of the microscope (it can be rotated to click lenses into place?) ____________________________________________20. A microscope has an ocular objective of 10x and a high-power objective of
50x, what is the microscope's total magnification? ______________Magnification and resolution of a microscope:21. Fill the table belowObjective lensName of the ObjectiveOcular lensTotal Magnification4x10X40X100X22. Two lenses with N.A of 0.75 and 1.25 are used to view a specimen.
They are using a light with wavelength of 540nma. What is dmin?
d. Write the formula for d
minc. which of these lenses will give higher resolutionNext 1.Which adjustment knob should you use on the high power? _________________________2.How do you prevent the slide from falling off the stage? ______________________________________________________________________________________________________3.
Which adjustment knob is used for bringing the specimen into focus? _________________4.Which adjustment knob is used for sharpening the image of the specimen after it is focused? _______________________5.What is the function of the field iris diaphragm and aperture iris diaphragm? __________________________________________6.How holds the objective lenses and how do you change the objective lenses? __________________________________________________________________________________________________________________