Many cells are transparent and colorless Structures of great

Last updated: 6/26/2023

Many cells are transparent and colorless Structures of great interest in biology and medicine can be practically invisible to ordinary microscopy An interference microscope reveals a difference in index of refraction as a shift in inter ference fringes to indicate the size and shape of cell structures The idea is exemplified in the following problem An air wedge is formed between two glass plates in contact along one edge and slightly separated at the oppo site edge When the plates are illuminated with monochro matic light from above the reflected light has 85 dark fringes Calculate the number of dark fringes that appear if water n 1 33 replaces the air between the plates