Figure 1 shows the schematic representation in which two adjacent regions of the same cell, A and B, of a different thickness, t1 and t2 and with different refractive indexes, n1 and n2, are crossed by a luminous ray. However, it finds in its path regions of different refractive indexes, and different thicknesses and/or densities, which is able to alter their speed and direction. The light is transmitted through living cells. Living cells are transparent to visible light, so light rays pass through without loss of intensity. So, these optical instruments help to solve the problem. Phase-contrast microscopy and the interference microscope give us the possibility to observe living cells without any preparation, since when performing other procedures there is the possibility that some of its components may be lost or distorted by methods such as fixation, coloring, freezing, and others.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |