| 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
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| 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
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| 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
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| 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
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| 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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