Why do we see lightning before thunder? | #aumsum


Topic: Light and Sound. Why do we see lightning before thunder? Don’t go out tonight. A huge storm is coming. Look at the weather outside. See, there’s a huge lightning strike. Now, very soon, you are going to hear some thunder. I told you. Don’t get scared. It’s just thunder. Do you know why you saw the lightning before you heard the thunder? I will tell you. An interesting fact is that lightning and
thunder occur at the exact same time. Then why do we see lightning first? This is because light travels faster than
sound. The speed of light is 300 million meters per second while the speed of sound is only 340 meters per second. Thus, the light from the lightning travels
much faster to our eyes. As a result, we first see the lightning, shortly followed by the sound of thunder.

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63 thoughts on “Why do we see lightning before thunder? | #aumsum”

  1. Midzy says:


  2. Thomas HAN says:


  3. Admiral Yi sun-shin says:

    Third comment

  4. Admiral Yi sun-shin says:

    Make video of erosion


    u people are awesome…developing curiosity in all….. thanks and keep educate us…

  6. Raj Khanna says:

    ha ha ha ha

  7. habiba shahzad says:

    please upload ur videos like the old one like global warming one please
    extra edeted the boy one

  8. Amar Singh says:

    I love this boy….

  9. Anime lover says:

    Mr smart videos were better than these

  10. Yogesh kr niraj says:

    I love this channel so much ……… thanks, smart bro

  11. Huda Noorain says:

    can you make a video on animal reproduction? I mean how reproduction takes place in dogs, cats etc. Is there more than one type?

  12. victoria sanchez says:

    gwapo ang inyong pas pangit

  13. Fact Burner says:

    Please make a video on speed and velocity

  14. Ansh Jain says:

    may u tell us which type of software u use to make such good animation

  15. robloxmemberyash321 games says:

    Please please please. send the video of three types of rocks

  16. Thomas Suson says:

    Great education for everyone explains and has a good diagram for the younger ones

  17. Ahmed Abdalla says:

    Actually light travels 300,000 KM per second

  18. SREE VASTAVA says:

    Nice video, Ha Ha Ha!

  19. Ivy the dazzling girl says:

    smart learning for all please tell how do cyclones ,heavy rain , earth quake ,volcanic eruption and droughts occur?

  20. Rahil Amin Talukdar says:


  21. Akshay Dhavale says:

    0:27 😂😂

  22. It's AumSum Time says:

    Did you like the Video??

    Watch More Videos :

  23. Shilpy Koul says:

    ohhhh i love him so much

  24. Deepannita Deka says:

    Pls tell how drinking of water help to prevent pimples

  25. Nirajan Pradhan says:

    Thats why i close my ear after seeing light

  26. Mr. Cat says:

    Because if you listen the song Thuner From Imagine Dragons It will say I was lightning before the thunder.

  27. Mr. Cat says:


  28. Anil lee Anil says:

    Hahaha so funny and good classes 😁😁😃

  29. nupur jha says:

    Also make a video on what causes lightning and thunder

  30. angelo studios says:

    O i think i don't know this after it i have known that I know this it comes from eco

  31. Ayush Agarwal says:

    Why do we see lighting before thunder?
    me : because our eyes are in front and ears are back. 😂😂

  32. Rittu rana says:

    I am addicted to the awesome aumsum

  33. BookwormJoshua Gaming PH says:

    Lightning and the thunder(the song)

  34. Kitty Angela Sudiparo says:

    Knew this already still came cus I love this channel 😀😊😊

  35. queena__ 786 says:

    Very interesting video loved the way he smiles 😁😎

  36. Ja Mes says:


  37. zeroxy says:

    Why do we see lightning before we hear thunder?Easy….it just lag

  38. Sourabh says:

    How Thunder forms

  39. Habiba Shahzadi says:

    I like aumsum

  40. S S says:

    very nice

  41. dumb pros says:

    thank you

  42. Jhebert Dela Cruz says:

    My dad thought that it was just rocks rolling under the Earth.

  43. Boi2.0 says:

    Oh it might because of light travels faster than sound

  44. Joseph Umlas says:

    Thats okay if he did not go outside he will not discuss it

  45. Science project says:

    But sound speed depant into a temperature also

  46. ## shruti ## says:

    Tell me how does lightening occurs

  47. Something Maybe says:


  48. Sadhan Das says:

    Please make a video on ' how thunderstorm causes '.

  49. Sadhan Das says:

    I need the video its urgent

  50. Black Shadowz says:

    Because of lag

  51. Shabbir Siddiqui says:

    Awesome video

  52. Ali Asgar says:

    Its because of lag

  53. ΞXILM says:

    I know it's lag you must have Intel HD Graphics

  54. Ayori kun says:

    I thought it was because of lag

  55. Ronald omg fan says:

    Thought me alot

  56. Logan says:


  57. 八雲紫 says:

    why does lightning come before thunder?

  58. Moaz Ahmed says:

    I knew that light is faster than sound but not that much

  59. 八雲紫 says:

    because lag.

  60. All Time Gaming says:

    Now I know that the lightning followed by the thunder it is caused by travelling speed causing it to delay to hear that thunder!

  61. Derya Baygan-Robinett says:


    no! no yay or hooray

  62. Derya Baygan-Robinett says:

    wow not alot of people commented on this video

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