Question

Phase contract microscopy, used to visualize cyanobacteria from Antarctica in this figure, relies on image. Click to view larger image. to produce an emission of photons from excited molecules in the specimen 2) detection of electrons passing through a specimer destructive interference between light waves passing through the specimen versus light passing through the medium 3 4) reflection of light of the specimen

Answer 1

Answer: Choice 3

Reason: Cyanobacteria are blue-green algae which emmit differential spectrum of light under normal light. In order to visualize this bacterium, phase contrast microscopy is used. This microscopy is based upon the priniciple of interference of light emerging from the source after incidence from the source of light.