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26. In fluorescence microscopy, which of the following performs the function of removing all light except the blue light?
a. Exciter filter
b. Barrier filter
c. Dichroic mirror
d. Mercury arc lamp
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Answer: (a).Exciter filter

27. Total Magnification is obtained by__________
a. Magnifying power of the objective lens
b. Magnifying power of eyepiece
c. Magnifying power of condenser lens
d. Magnifying power of both the objective lens and eyepiece
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Answer: (d).Magnifying power of both the objective lens and eyepiece

28. In light microscopy, which of the following is used as fixatives prior to staining technique?
a. Osmic acid
b. Glutaraldehyde
c. Heat
d. Osmic acid, glutaraldehyde, heat
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Answer: (c).Heat

29. In Phase contrast microscopy, the rate at which light enters through objects is__________
a. Constant
b. Inversely proportional to their refractive indices
c. Directly proportional to their refractive indices
d. Exponentially related to their refractive indices
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Answer: (b).Inversely proportional to their refractive indices

30. Which part of the light microscope controls the intensity of light entering the viewing area?
a. Coarse adjustment screw
b. Fine adjustment screw
c. Diaphragm
d. Condenser lens
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Answer: (c).Diaphragm

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