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ఆకాశవాణి కడప కేంద్రం వార్తలు చదువుతున్నది
మీ H. పరమేశ్వర రావు 😉 📻🎙️#RadioDay
కాంతి వేగ పౌనఃపున్యాల (Frequency)తో విద్యుత్‌ అయస్కాంత (Electro Magnetic) తరంగాలను మాడ్యులేషన్ చేయటం ద్వారా తీగల ఆధారము లేకుండా గాలిలో శబ్ద సంకేతాలను ప్రసారం చేయు ప్రక్రియను #WorldRadioDay #Radio
మీ H. పరమేశ్వర రావు 😉 📻🎙️#RadioDay
కాంతి వేగ పౌనఃపున్యాల (Frequency)తో విద్యుత్‌ అయస్కాంత (Electro Magnetic) తరంగాలను మాడ్యులేషన్ చేయటం ద్వారా తీగల ఆధారము లేకుండా గాలిలో శబ్ద సంకేతాలను ప్రసారం చేయు ప్రక్రియను #WorldRadioDay #Radio
దూర శ్రవణ ప్రక్రియ (Radio Transmission) అంటారు. ఇలాంటి ప్రసారాలను వినటానికి ఉపయోగించే సాధనాన్ని రేడియో అంటారు. మొదటిరోజులలో వాల్వులను ఉపయోగించి, రేడియోలను తయారు చేసేవారు. అవి ఎక్కువ విద్యుత్‌ను వాడేవి, పరిమాణంలో కూడా చాలా పెద్దవిగా ఉండేవి. ఒక చోట మాత్రమే ఉంచి వినవలసి వచ్చేది.
1960లు వచ్చేటప్పటికి, ట్రాన్సిస్టరు కనిపెట్టబడి, ఆ ట్రాన్సిస్టర్ లను వాడిన రేడియోలు వాడకంలోకి వచ్చాయి. వీటిని ట్రాన్సిస్టర్ రేడియోలు అని పిలవటం మొదలు పెట్టారు. ఇవి విద్యుత్‌ను చాలా తక్కువగా వాడుకుని పనిచేయగలవు. పైగా, ఘటము (బ్యాటరీ-Battery)తో కూడా పనిచేయగలవు.
Happy World Radio Day 12th Feb!
Plz post songs with radio or radio station shown as prop in film video. Eg- Meet na Mila (Abhimaan) 🙏
VC: Radio collector Anil Kumar Mishra #Radiotalk #WorldRadioDay #RadioDay #marconi #akashvani #AIR @AIRCuttack @prasarbharati @OdiaCulture
Plz post songs with radio or radio station shown as prop in film video. Eg- Meet na Mila (Abhimaan) 🙏
VC: Radio collector Anil Kumar Mishra #Radiotalk #WorldRadioDay #RadioDay #marconi #akashvani #AIR @AIRCuttack @prasarbharati @OdiaCulture
There are many #Radio theme song, mostly from films during the b/w era.. sharing some links here in thread.. Humne tujhko pyar (Dulha Dulhan)
In the shadowy corners of the shortwave spectrum lurk the Numbers Stations: strange radio broadcasts of mysterious blocks of numbers in creepy monotone voices!
It's actually an old form of spycraft which is still in use today. And as it's #WorldRadioDay let's take a listen...
It's actually an old form of spycraft which is still in use today. And as it's #WorldRadioDay let's take a listen...
A Numbers Station is a type of one-way voice link for sending information to spies in foreign countries.
Operating on Short Wave radio bands they transmit a secret code of spoken numbers. Use of Numbers Stations peaked during the Cold War, but some are still operating today.
Operating on Short Wave radio bands they transmit a secret code of spoken numbers. Use of Numbers Stations peaked during the Cold War, but some are still operating today.
Numbers Stations are operated by various national intelligence agencies. At set times on a pre-arranged frequency a musical tone is played, followed by a speech synthesised voice reading out blocks of numbers. To most listeners it sounds both creepy and meaningless.
In the shadowy corners of the shortwave spectrum lurk the Numbers Stations: strange radio broadcasts of mysterious blocks of numbers in creepy monotone voices!
It's actually an old form of spycraft which is still in use today. And as it's #WorldRadioDay let's take a listen...
It's actually an old form of spycraft which is still in use today. And as it's #WorldRadioDay let's take a listen...
A Numbers Station is a type of one-way voice link for sending information to spies in foreign countries.
Operating on Short Wave radio bands they transmit a secret code of spoken numbers. Use of Numbers Stations peaked during the Cold War, but some are still operating today.
Operating on Short Wave radio bands they transmit a secret code of spoken numbers. Use of Numbers Stations peaked during the Cold War, but some are still operating today.
Numbers Stations are operated by various national intelligence agencies. At set times on a pre-arranged frequency a musical tone is played, followed by a speech synthesised voice reading out blocks of numbers. To most listeners it sounds both creepy and meaningless.
Happy #WorldRadioDay everybody! And to celebrate I'm counting down my top 10 radio-powered inventions!
Let me just warm the valves up first..
Let me just warm the valves up first..
At no 10: the radio police helmet! It contains a hundred feet of wire - I'm assuming it's all copper...
At no 9: radio darts! How did this not catch on...
My book "Ask An Ocean Explorer"(*) is out in 30 days (on 21 Feb).
So for the next 30 days, I'll be sharing some of the wonders & history of exploring the deep here, in #30daysofdeep
(*<cough>available for pre-order, e.g. amazon.co.uk/Ask-Ocean-Expl…; also for Kindle, & audio book)
So for the next 30 days, I'll be sharing some of the wonders & history of exploring the deep here, in #30daysofdeep
(*<cough>available for pre-order, e.g. amazon.co.uk/Ask-Ocean-Expl…; also for Kindle, & audio book)
On this day, 59 years ago, two people reached the ocean's deepest point for the first time.
Here's a wonderful account by one of them, Don Walsh, in his own words: scientificamerican.com/article/diving…
And here's some archive newsreel footage:
#30daysofdeep 1/30
Here's a wonderful account by one of them, Don Walsh, in his own words: scientificamerican.com/article/diving…
And here's some archive newsreel footage:
#30daysofdeep 1/30
#30daysofdeep 2/30
Here's Gorringe Bank, a twin-peaked seamount near Portugal that rises from ~5 km deep to ~50 m deep, taller than Mont Blanc in the Alps. Home to >800 species, from deep-sea glass sponges to kelp.
Discovered by USS Gettysburg in 1875 under Capt Henry Gorringe.
Here's Gorringe Bank, a twin-peaked seamount near Portugal that rises from ~5 km deep to ~50 m deep, taller than Mont Blanc in the Alps. Home to >800 species, from deep-sea glass sponges to kelp.
Discovered by USS Gettysburg in 1875 under Capt Henry Gorringe.
Tea, Triumph, Tragedy. Co-authored column on the forgotten Indian genius who saved millions of lives. [Long read.] #ForgottenIndianScientists swarajyamag.com/science/brahma…
Qaid-e-hayat aur band-e-gham asl mein dono ek hain, phir maut se pehley aadmi gham se nijat paye kyoun?
Co-authored column on the the forgotten Indian wizards and the birth of modern forensics. [Long read.] #ForgottenIndianScientists swarajyamag.com/science/the-fo…
Co-authored column on the the forgotten Indian wizards and the birth of modern forensics. [Long read.] #ForgottenIndianScientists swarajyamag.com/science/the-fo…
Please read, share, and support articles on science and on the history of our science and our scientists. Our governments have forgotten them; we shouldn't. We wouldn't. #ForgottenIndianScientists
