yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Почему так долго не могли создать синий светодиод? Ответ — в нашем видео #vertdider #veritasium


less than 1m read
·Nov 3, 2024

Цвет светодиодов определяется совсем не их оболочкой. Вот здесь, например, оболочка бесцветная, а свет красный. За цвет отвечает сама электроника, оболочка просто помогает нам отличать светодиоды друг от друга.

В 1962 году инженер из General Electric, Ньютон, представил первый светодиод видимого спектра. Он излучал тускло-красный свет. Несколько лет спустя в Монса создали зелёный светодиод. Следующие 30 лет только эти два цвета и были, а потому светодиоды применяли разве что в разных индикаторах, калькуляторах и часах.

Не хватало синего. Смешав с ним красный и зелёный, можно было бы получить белый и все остальные цвета, что открыло бы дорогу освещению всех возможных оттенков: от ламп в помещениях, экранов смартфонов и компьютеров до телевизоров и билбордов. Но синего добиться было сложнее всего.

More Articles

View All
Biodiversity and ecosystem health: a Hawaiian Islands case study | Khan Academy
When you think of islands, you might think of pristine beaches and palm trees gently swaying along with a warm breeze. Sounds like paradise! As a scientist, islands are my kind of place for research. Islands are very beautiful, and they also have a lot o…
Warren Buffett on Bitcoin: Has His Opinion Changed?
Bitcoin, it’s ingenious and blockchain is important, but Bitcoin has no unique value at all. It doesn’t produce anything. You stare at it all day and no little bitcoins come out or anything like that. It is a delusion, basically. One point this weekend y…
Ancient City of Nan Madol | Lost Cities With Albert Lin
[dramatic music playing] MALE SPEAKER: This is it, Albert. Welcome to the jungle. We are on sacred grounds right now. You’re just beginning to see part of the structures. ALBERT LIN: I’ve never seen anything like this. MALE SPEAKER: Welcome to Nan Mado…
Gisele Bündchen: Why I'm Involved | Years of Living Dangerously
I think it’s important for people to take notice about climate change because it is important for our survival. It’s important for everyone’s life. I want to do something now before it’s too late, and that’s why I’m doing this documentary. Quite frankly,…
Antietam part 2
So, in the last video, Sal and I were talking about the Civil War Battle of Antietam. Antietam took place in Maryland on September 17th, 1862. Just to briefly recap, Antietam was the single bloodiest day in American history; over 4,000 people died. Antiet…
Honey hunting in the dead of night | Primal Survivor: Extreme African Survivor
I definitely would not want to fall from this height. We need to get to the hive out of the branches and lower it down. We’re going to bring it down. We’re going to lower it. This thing is heavy, yeah, I have it. Bees release pheromones when they’re threa…