What type of microscope is used for fluorescence-based techniques in histology?

• A. Fluorescent
• B. Brightfield
• C. Electron
• D. Phase-Contrast

Answer: (A)

Fluorescence-based techniques rely on fluorophores that emit light when excited by a specific wavelength, so you need a microscope that can both provide the right excitation light and detect the emitted fluorescence. A fluorescent microscope is designed with excitation light (often UV or blue), excitation and emission filters, and a sensitive detector to visualize the labeled targets in tissue. This is distinct from brightfield (transmitted white light, not suitable for fluorescence), electron microscopy (uses electrons, not light), and phase-contrast (enhances contrast for unstained specimens).