What's a technology that was cooler in its older iterations?
What's a technology that was cooler in its older iterations?
I don't mean BETTER. That's a different conversation. I mean cooler.
An old CRT display was literally a small scale particle accelerator, firing angry electron beams at light speed towards the viewers, bent by an electromagnet that alternates at an ultra high frequency, stopped by a rounded rectangle of glowing phosphors.
If a CRT goes bad it can actually make people sick.
That's just. Conceptually a lot COOLER than a modern LED panel, which really is just a bajillion very tiny lightbulbs.
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Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and the advent of much cheaper, more sophisticated, and more effective electronic navigational systems.
They were quite important for a long time. We used them for thousands of years, and they're often unique in form, iconic. And they're a good subject for photos and paintings, and I think that the light effect from them is neat. Lots of books and such using them, like ones on remote rocks, to get an isolated setting ("the lone lighthouse keeper").
But the past few decades of technological advancement have probably closed the end of their era.
Narrator: and that is how the great solar storm of 2027 wiped out the entire naval shipping and logistics industry.
Let's hope not...
On a modern container ship, by the time you'd see the light, it's already to late to avoid running aground.
Similarly, at airports they had these alternating white and blue lights that would sweep the sky for miles around. When we were on the road at night I used to know where we were based on that. I loved it.
Flight instructor here. That is called a beacon, and airports still have them. And none of them have ever been blue. It may appear blue from the ground but the beam is actually green. The colors actually encode what kind of airport they're at.
At a normal civilian airport that has runways, the beacon will be green and white.
At a military airfield, the beam will flash green and then two whites.
At a heliport with only helipads for helicopters, the beacon will be green, yellow, white.
At a seaplane base, the beacon will be white and yellow.
The beacon will operate from sunset to sunrise, and also during daylight when instrument conditions prevail.
Bonus airport light fact: some smaller, less busy airports like your typical county airport probably does not turn all of its surface lights on all of the time. It'll run the beacon to help pilots find the airport, but the runway and taxiway lights will remain off. Pilots are able to turn them on from the air by tuning their radios to the airport's UNICOM frequency and pushing the PTT key several times in rapid succession. Quite often the brightness is controllable whether you press the key 5, 7 or 9 times. This is called Pilot Controlled Lighting. It's an energy saving system that's been around for decades now, and a fun magic trick for private pilots to pull on their friends lucky enough to be invited on a night flight.
I've witnessed the lights getting turned on for a landing when driving past my local airport before. That's neat to know it might be pilot controlled!
It's possible to look that up in a document called the Airport Facility Directory (which they now call Chart Supplements apparently) but if you don't speak pilotese you're not going to make heads or tails of it. Here's the line that instructs pilots that there's pilot controlled lighting at the first airport I ever landed at:
Actvt MALSR Rwy 05; REIL Rwy 23; PAPI Rwy 05 and 23; HIRL Rwy 05–23—CTAF
That expands to "Activate Medium Intensity Approach Light System for runway 5, Runway End Identifier Lights for runway 23, Precision Approach Path Indicator for runway 5 and 23, High Intensity Runway Lights on runway 5 and 23 on the Common Traffic Advisory Frequency." It's actually weird to me the PAPI is pilot controlled; usually those are constantly on because they're useful even during the day.
Drag doesn't like light pollution. Imagine living in the light path of a lighthouse. Every minute your bedroom lights up like Christmas then goes dark again.
I think if you lived near a lighthouse you would invest in some blackout curtains.