What does collimated energy mean?

• A. Photons are parallel producing a beam
• B. Photons diverge widely
• C. Wavelength broadens with distance
• D. Energy is zero

Answer: (A)

Collimated energy means light rays travel in nearly parallel directions, forming a beam that stays narrow as it moves. In laser hair removal, this parallel alignment keeps the energy density high at the target and minimizes how much the beam spreads, giving precise, controlled delivery and deeper penetration with less unwanted exposure. If the photons diverged widely, the beam would spread out, lowering energy density and reducing effectiveness. Wavelength broadening with distance describes spectral changes rather than beam direction, and saying energy is zero isn’t meaningful for a beam of light.