Why Incandescent Bulbs DON'T really Flicker (Even on AC Power)?
All THERMAL sources have large inertia (lag)
They can’t change brightness instantly.
That’s why Incandescent bulbs barely flicker, even on AC power (50/60 Hz).
Let me explain..
The filament in the Incandescent bulb takes time to heat up & cool down, so it doesn’t react instantly to each AC cycle.
This creates a low-frequency flicker that’s SMOOTHED OUT by the filament’s thermal inertia, making the light appear stable even with AC power.
Higher wattage incandescent bulbs have larger filaments that take EVEN LONGER to heat up & cool down.
So the bigger the filament,
The slower the temperature fluctuations,
Meaning the bulb has even less time to react to the fluctuations in the AC current.
So you get even less flicker with higher wattage (60w vs 250w) Incandescent bulb..
This video is going to BLOW YOUR MIND.
In Kazakhstan🇰🇿
A family turns on a Microwave & the lights go ON in the entire stairwell of the building across the street.
Sounds like witchcraft, right?
IT'S NOT.
Here’s what’s actually going on..
The Microwave runs at 2.45 GHz Wireless Radiation.
The same frequency band used by WiFi, Bluetooth and cheap motion sensors.
Over time, the shielding around the door grill wears out & that 2.45 GHz energy starts to leak.
That leaked energy bounces.. off staircase railings, metal window frames, ceiling fans, steel rebar inside walls. Everything metal becomes a mirror for those invisible RF waves.
All that bouncing creates this messy soup of reflections & harmonics, spreading right across the street.
And those stairwell lights?
They’re triggered by microwave motion sensors.
These sensors don’t see light or heat, they detect changes in REFLECTED RF Energy.
When the leaky oven fires up, it floods the area with electromagnetic RF noise that the sensors mistake for a human walking.
As a result, the whole stairwell lights up, Perfectly in sync with someone making popcorn.
and the craziest part is it’s PERFECTLY LEGAL.
Microwave ovens are allowed to leak up to 5 mW/cm² at 5 cm from the surface, according to the safety standards.
That’s 50,000,000 μW/m²
Building Biology, on the other hand, says anything above 10 μW/m² is EXTREME CONCERN.
Even 1/2 a meter away, you’re standing in radiation levels millions of times higher than what’s considered biologically reasonable.
And it doesn’t stop at Microwaves.
Your WiFi router, your Bluetooth earbuds, your car RADAR, your smartwatch, they’re all blasting their own invisible RF frequencies.
2.45 GHz here, 5.8 GHz there, harmonics stacking like ghosts, bouncing off every metal surface around you.
One day, you’ll realize.. the real microwave miracle isn’t that it turned on a stairwell across the street.
It’s that somehow…
We all learned to live inside one.