some basic concepts on black hole (a short presentation)

1. BLACK HOLE
(SOME BASIC CONCEPTS)
PRESENTATION BY :
SWAYAMSIDDHA PANDA

2. IMAGE OF A BLACK HOLE

3. Black holes are some of the strangest and most fascinating
objects found in outer space. They are objects of extreme
density, with such strong gravitational attraction that even
light cannot escape from their grasp if it comes near enough.
What is a black hole ?
Albert Einstein first predicted black holes in 1916 . The term
"black hole" was coined in 1967 by American astronomer John
Wheeler, and the first one was discovered in 1971.

4. SECOND BIGGEST BLACK HOLE IN THE UNIVERSE FOUND
BY NASA

5. (Details of a black hole)
Different parts of
black hole :
• EVENT HORIZON
• SINGULARITY
• SCHWARZSCHILD
RADIUS

6. WHAT IS EVENT HORIZON & SINGULARITY ?
An “event horizon” can basically be thought of as the boundary of a black hole,
although there's nothing actually there that could be touched or anything like
that. What's special about an event horizon is that once anything, matter or
even light, passes beyond the event horizon, it can never escape from the black
hole, and will continue falling towards the centre of the black hole, which is
called as “singularity”.
At singularity, the gravitational force is maximum.
WHAT IS SCHWARZSCHILD RADIUS ?
The distance from the singularity to the event horizon is called the
Schwarzschild radius.

8. WHAT WILL HAPPEN IF YOU FALL INTO A BLACK HOLE ?
If you were watching someone falling into a black
hole and he is heading his feet first towards the
event horizon, a process called the tidal effect
aka spaghettification, would occur. The closer to
a black hole you get the stronger pull. The
gravitational pull becomes stronger & the faster
you travel, it will make you look stretched out.
You can imagine the person’s feet having a
stronger pull than the person’s head. Tidal forces
would compress you and stretch you.

9. SUMMARY
WE DISCUSSED ABOUT :
• WHAT IS A BLACK HOLE ?
• DIFFERENT PARTS OF A BLACK HOLE (EVENT HORIZON,
SINGULARITY & SCHWARZSCHILD RADIUS)
• WHAT HAPPENS IF SOMEONE FALLS INTO A BLACK HOLE ?