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Laser Focusing & Spot Size Simulator
Visualize Gaussian beam focusing in real time. Adjust Focal Length, Input Beam Diameter, and M² Beam Quality to calculate focused spot size, depth of focus, and peak intensity instantly.
Laser Focusing & Spot Size Simulator Understanding the Physics of Electromagnetic Spectrum
The simulator above demonstrates the fundamental relationship that governs all photonics: the connection between Wavelength (λ), Frequency (f), and Energy (E).
As you drag the slider from left (Radio) to right (Gamma), you are witnessing an inverse relationship. Because the speed of light (c) is a universal constant, as the wave gets physically shorter (wavelength decreases), it must oscillate faster (frequency increases) to cover the same distance.
Photon Energy Variation
Notice how the Photon Energy indicator changes from Low to Extreme. This is the boundary between safe and dangerous radiation:
- Non-Ionizing (Left Side): Radio, Microwave, and Visible light carry lower energy. They can transfer heat to tissue, but they cannot break chemical bonds.
- Ionizing (Right Side): Once the frequency crosses into Ultraviolet (UV) and X-Rays, individual photon energy is high enough to strip electrons from atoms. This is why UV lasers are used for sterilization—they physically disrupt molecular bonds.
