天氣如何影響互聯網速度？ 降雨對磁場和電場的影響#UPSC

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2. Thank you sir ?

3. Dear Siddhant Agnihotri,
   
   I am Manoranjan doing my Ph.D. in computational electromagnetics at IISc and Masters in Microwave and Radio Frequency Engineering.
   
   I follow your videos on YouTube and was watching your video about 『Internet connection in rain』. The video was quite interesting as well as informative. You also have tried your best to reach all sorts of audiences in a layman sense. I would like to add a few comments here on the video
   
   1. As you said Maxwell is the godfather of today』s wireless communication, which is absolutely right, but the wireless communication takes place due to displacement current in which electron is not required to carry the signal unlike the case of the conductor. (Which is governed by Ampier not Faraday, Just see, there is no magnetic rotor/actuator to generate H/magnetic field so its electric field responsible for communication)
   
   2. So, then what is displacement current:
   
   This current is derived by Maxwell when he modified Ampere's circuital law, as we know when there is a moving(only velocity DC current, accelerated A.C. current) charge there is current. But Maxwell reformulated that (As a great scientist he saw the 4 equations especially those two equations are not symmetric, Faraday's law, and Ampere's law, on which entire communication takes place in the modern world ) and Today what we know, even without moving a charge also we can generate the current. That』s called modified Ampiers circuital law.
   (Poynting theorem to calculate field)
   3. How can we generate that?
   
   You have nicely explained that light is an EM-wave. So, when we accelerate electron(charge) it produces a magnetic field (As we all know if there is a charge then there is filed, that is a nice explanation you have given on the video, and that field starts from the charge and ends at infinity, explained by a sphere concept on video as well). Also, we know the electric field and magnetic fields are coupled with each other when the frequency is greater than zero. (Proof: As we can see in the case of a charged battery, though static charges are there so there is an electric field present around the battery 『Gauss Law』)but if you bring a magnet around the battery its behavior doesn』t change.
   
   If we go for a home supply which is 50Hz, so the coupling will take place in between the electric and magnetic fields. Which we can prove by bringing a magnet around the wire, usually we do in our school experiment. So, the great scientist Heinrich hertz bring that concept of frequency. (Genius)

   In generic 「Wireless communication takes place due to the oscillation of the electron at a certain frequency, so due to oscillation field generated and those field travels at certain speed mostly at the speed of light (If there is dielectric is greater than 1 in the medium then speed hampers). When that frequency match to the receiver they communicate with each other」.

   Internet connection in rain:
   
   This happens because the water particle has a certain size, as I said in wireless communication signal travels in the air but now along with air, there are rain droplets. So, when a signal interacts with 2 different mediums one is air(dielectric constant 1 so you can say rarer medium) and the other is water (dielectric constant is around 80 and gradually decrease with increase in frequency).
   
   What happens here,
   
   1.As you have explained in fiber optics communication, if a signal travels in 2 different medium so it can reflect, transmit (for the larger boundary of the interface) scattered (if the wavelength is comparable to the size of boundary or structure, lots of Physics.. and many more physical things happens to the signal…… sorry guys lots of physics)
   
   2. So, we know if there is no rain then there will be direct communication from your mobile/TV/Internet broadband connection, I mean for all wireless communication. But when it rains signal faces all the above issues so there is path loss, signal distortion, multipath communication, so signal strength reduces drastically depending on the size of raindrops. So, we don』t get proper communication only in wireless communication.
   
   3.If the communication is wired it will not get affected. (Proof: We see current supply and we know it is a low-frequency signal and wired as well, due to rain it never gets affected, Lets see a high-frequency communication when we have landline even if there is rain it doesn』t impact on communication)
   
   4. Now you will have questions like dust particles and other things are present in the air. Yes, they do but they are so tiny that only scattering happens that too when we communicate at very high frequency. (If you are staying in the dusty area then there is a high chance that you will experience the wireless communication connectivity problem as well)

4. Thanks sir , keep growing ?

5. Thanks sir…. Very informative ??

6. I am waiting for a lot of days. why Study iq not make video on RAISE 2020 recently. such that it is best essential topic.

7. Sir ap topic samjate achha ho but thoda depth me ho jata he…….

8. M0=M/[{c^2-v^2}^(1/2)], according this formula if we travel as near light speed, then our mass will be Infinity…….

9. आज कल महिलाओं के प्रति बढ़ते अपराध पर आज की webseries और फिल्मों का जैसे मिर्ज़ापुर या altbalaji आदि के प्रभाव पर एक वीडियो बनाए?

10. Sir I am a student of Applied Electronic & Instrumentation Engineering, in our course Electromagnetic field theory is very hard subject……. Sir Jagadish Chandra Bose inventor of Radio Communication

11. सर आपको ऑप्टिकल फाइबर और मोबाइल टॉवर और अच्छे से समझना चाहिए था। आपने फिजिक्स बोहोत अच्छे तरीके से समझाई पर अगर आप ऑप्टिकल फाइबर कैसे कम करता है और मोबाइल टॉवर कैसे काम करता है इनको समझने में अगर आप थोड़ा और वक़्त देते या और डीटेल में समझते या इस हि वीडियो का दूसरा पार्ट लाते तो अच्छा होता। कुइकी इस टॉपिक्स में ऑप्टिकल फाइबर और मोबाइल टॉवर किस तरीके से इक दूसरे के साथ कनेक्ट है, वो कैसे काम करते है ये अगर आप समझते तो और अच्छा होता और ये वीडियो फुल प्रूफ होता।

12. sir quantum physics pe videos banayena….. though I'm commerce background, i love physics also?

13. Lagta hai jee clear karne bhi Indian express padhna padhega ??

14. Sir time ko rokna possible hai

15. Sir aap physics padhana start krdo??

16. Sir pta kese chalta h ki optical fibers kaha se tuti h..? ?

17. "is se pahle science pe jaye bat deta hu Insta pe aagya hu " rhyme ki sense hai aapko

18. You diserve to be a professor in some technical university , because your way of teaching is awesome , lectures are very energetic , specially on science topics, lot of respect for you sir .

19. Maja aayega? sir ka lecture dekh lo

20. "Jagdish Chandra Bose hamare hi hai " ??? vo aapke hai ???

21. Quantum physics pe lecture lo sir

22. Unreasonably elongating all lectures by double to its original size

23. Thank you so much sir?

24. Sir Pushpam Priya Chaudhari ki biography cover kariye pular party ki president Bihar me?????????????????????????????????

25. Hi it's a humble request to please create a detailed lecture on theory of relativity.

26. I prefer rain over destructive & subversive net.

    Rains are helpful for human survival, internet is not!

27. Sir please nuclear force pe ek lecture upload kijiye na .utne sare proton nucleus me kaise rehte hai.stability kaise hota hai

28. Credits should be given to Maxwell, Tesla and JC Bose.

29. Sir quantum physics jb bta re the maine to sir pkd liya apna or kha ni ho payega mujhse.. anyway I like to watch this channel for current affairs only but i always enjoy your lecture

30. rain mei internet q nehi ate samjhne aya tha.. pura physics samjha dya.. arre yar ?
    level of out of context ?

31. Commerce vale log ko to samj ne me to …. Bhai bhai

32. Thank you for this great lecture. I wish I would had studied my engineering physics under your guidance sir. You nailed it sir

33. Baat toh sahi hai lekin mere upar se paar ho gaya…

34. Masale dar tarika hey Aapka sir manna padega

35. Why dont study iq make video on Vedic Rashmi theory by Agnivrat Arya. In counter of Big bang theory.

36. 19:25 real analysis…….
    Science student watch full lecture….
    You will enjoy this entire video ?

37. I wish you were my physics teacher in 10th standard

38. Sir aap indian express padhte hai ya The new Indian express?

39. Please take a lecture on space and time.

40. Toh isiliye pichle din online class disconnect ho gya.???

41. Sir biography on bill clinton

42. Sir you explained more practically than our most of ECE Engineering professors?

43. Bahut Relevant topics lekr aate hai Sir.
    thanks Sir .?

44. Hello, Sir!

    Good evening!

    I hope you and the entire study iq team is doing well in this pandemic. Sir, you and the team are doing wonders through this platform! So inspired that I am re appearing for IFS and started my preparation. ?

    Sir, I kindly request you to make a video on Quantum Physics and it's Concept and Branches.

45. Thank You So Much Sir??

46. Sir i am a commerce student, no doubt the video was awesome but plz make it diagrammatic so as to easy to understand for us.

47. Thanks you so much sir , this question was always in mind

48. Now… i am waiting for a quantum physics lecture

49. Sir I'm also a student of BSc. Phys.
    Very glad to see this video sir

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