What optical phenomenon did Stokes study?
Refraction
Diffraction
Fluorescence
Magnification
Answer
Fluorescence, the optical phenomenon studied by Stokes, occurs when certain substances absorb light of a specific wavelength and then emit light of a longer wavelength. This emitted light is typically visible, making the substance appear to glow. Fluorescence is commonly used in various applications, such as fluorescent lighting, lasers, and medical imaging.
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