Editing Lasers and Photonics (section)

== <span style="color: #FFFFFF;">Applying</span> ==
'''Modeling 'The Laser Gain' (Predicting if a laser will 'Fire'):'''
<syntaxhighlight lang="python">
def check_laser_threshold(energy_input, absorption_loss):
    """
    If Gain > Loss, the laser 'Fires'.
    """
    # Gain is proportional to energy input
    gain = energy_input * 0.8
    
    if gain > absorption_loss:
        efficiency = (gain - absorption_loss) / energy_input
        return f"STATUS: LASING! Output Efficiency: {round(efficiency*100)}%"
    else:
        return "STATUS: NO BEAM. Just a faint glow (Spontaneous Emission)."

# Case: High energy pump
print(check_laser_threshold(100, 20))
# Case: Low energy
print(check_laser_threshold(10, 20))
</syntaxhighlight>

; Photonics Landmarks
: '''Fiber-Optic Cables (1970s)''' → Allowed for the "Global Internet." A single fiber the size of a "Hair" can carry every "Netflix movie" ever made at the "Same Time."
: '''Laser Eye Surgery (LASIK)''' → Using a "Femtosecond Laser" (which pulses in a 'Billionth of a second') to "Reshape" the cornea with "Atomic Precision."
: '''LIDAR''' → The "Laser Radar" used by "Self-Driving Cars" to "Scan" the world in 3D, creating a "Real-Time Map" of every car and pedestrian.
: '''Optical Tweezers''' → Using a "Laser Beam" to "Pick up and Move" a single "Bacteria" or "Molecule" without touching it, winning the Nobel Prize in 2018.
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