Quantum Physics | United States America (US)

Create: 2021-03-11 Update: 2024-06-01 06:47:33

ادامه:

اما این جهانِ تاریک، با گذشت زمان به انبساط خود ادامه میداد و هرچه میگذشت سردتر و کم انرژی تر میشد
با کاهش دما تا حدود ۳۰۰۰ کلوین انرژی و سرعت الکترونهای سرگردان به اندازه ای پایین آمد که پروتون های اولیه قادر به گیر انداختن آنها شدند و اتم های اولیه(هیدروژن، هلیم و...) تشکیل شدند.

حال فوتون ها قادر بودند آزادانه و بدون آنکه نگران در بند شدن الکترون ها باشند در فضا به سیر و سلوک بپردازند...
تابش به جا مانده از این نور(فوتون های اولیه) را "تابش زمینه کیهانی" میگویند.

از آنجا که همچنان جهان منبسط تر و سردتر میشد، انرژی این تابش اولیه فوتون ها نیز کاهش میافت. بگونه ای که با کاهش انرژی طول موج آن بزرگتر شده که امروزه در محدود ریز موج قرار گرفته است(دمای فعلی جهان به حدود ۲/۷ کلوین رسیده است)

«بنابراین در حال حاضر به این تابش، تابشِ ریز موج زمینه کیهانی یا به اختصار CMB میگوییم»

🆔 @Physics3p

Quantum Physics

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12.5K viewsAmir M.H, edited Mar 11, 2021 at 17:59

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How to Hide a Telegram Chat Without Permanently Deleting It

The easiest way to hide texts from view in Telegram without deleting them is to achieve them, although the process requires a few extra steps to complete. Follow the instructions below to do so on both mobile and PC. Open the Telegram mobile app (Android | iOS) and locate the convo you wish to archive, but don’t tap on it. Long-press it until you see a green checkmark appear next to the contact’s profile picture. A few buttons will show up in the upper-right corner as well. Select the “Archive” icon.On PC, you’ll need to right-click on the conversation on the right side of the display and select the “Archive” option.

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Quantum Physics TG
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