IPL differs from laser light because it uses which of the following?

• A. Broad spectrum of light energy
• B. Monochromatic laser light
• C. Ultraviolet only
• D. Infrared only

Answer: (A)

IPL’s distinguishing feature is its broad spectrum of light energy. It uses a xenon flash lamp to emit many wavelengths and then filters shape this spectrum to reach the skin, allowing multiple wavelengths to be delivered in one treatment. This breadth lets IPL target different chromophores—melanin in hair and pigmented spots, or hemoglobin in blood vessels—by using various wavelengths that are absorbed differently. In contrast, a laser produces light at a single wavelength that is coherent and highly focused, designed for precise, monochromatic effects. IPL isn’t limited to ultraviolet or infrared only; it typically covers visible light and near-infrared ranges depending on the filters used, whereas lasers are usually tuned to a specific wavelength.