Discussion
Fluorescent dyes absorb light at one wavelength and emit it at another longer wavelength. This can be examined under :
Answer: A
It is examined under a fluorescence microscope.
A fluorescence microscope illuminates the specimen with light of the excitation wavelength (often ultraviolet or blue) and uses filters to pass only the longer-wavelength light that the fluorescent dye emits. The labelled structures shine against a dark background, which is how fluorescent stains and antibody labels are viewed.
Stereozoom and dissecting microscopes are low-power light microscopes for viewing whole specimens in three dimensions with ordinary light, and an electron microscope uses an electron beam rather than light, so none of them detects fluorescence emission.
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