Video narration
Kya black hole bas brahmand ka ek vishal vacuum cleaner hai? Nahin, yeh aaspaas ki har cheez ko bina vajah kheenchne wala bhanvar nahin. Trampoline par bhaari cheez rakhne se satah jhukti hai; isse samajhiye ki bahut adhik dravyamaan spacetime, yaani jagah aur samay ke taane-baane, ko kaise modta hai. Lekin spacetime sachmuch koi chaadar nahin hai. Yeh vakrata cheezon aur roshni ke raaste badal deti hai. Black hole ke paas ye raaste bheetar ki or mudte jaate hain. Event horizon, yaani woh seema jahan se lautna sambhav nahin, koi deewar ya thos khol nahin. Iske paar spacetime itna bheetar muda hai ki baahar jaane ka koi raasta nahin, roshni ka bhi nahin. Roshni dheemi nahin padti; raaste hi bheetar mud jaate hain. To black hole se bachna asambhav kyun? Event horizon paar karte hi, aage ka har raasta, roshni ka bhi, bheetar jaata hai.