About the presenter: Srinivas is 10 years old. He is a part of Mango Astronomy Club. He is passionate about physics and astronomy. Enjoys sharing whatever he has learnt in science with his peers.

2. Quantum physics
BY SRINIVAS

3. “⋆ IF YOU THINK YOU
UNDERSTAND
QUANTUM PHYSICS
YOU DONT UNDERSTAND
QUANTUM PHYSICS
-Richard Feynman

8. The story of uncertainity

11. Double slit experiment

16. A single electron wave passes through both slits
at the same time

18. The state of being in multiple places at the same time
can be possible only in quantum realm

20. Subatomic particles have probability of moving through barriers

24. What happens when we throw a ball

25. Do you know the physics of an
electron revolving around the
hydrogen atom?

26. It is very difficult to understand the
way an electron behaves or orbits
around a nucleus
The physics of the real world
simply doesn’t apply to the
physics of the quantum world

27. 50%

29. Two boxes with two cats with
bomb of 50% chances of
blowing
In real world probablity

32. Take the boxes to two different galaxies
Still one cat comes out alive and other is dead when observed

33. Two subatomic particles with
a same source of origin are
always entangled
Even if they move from each
other billions of miles away
they are inexplicably linked

34. Measurement of one of the particle like it is spinning up or down is
always correlated with the other even if it is millions of miles away

35. If you measure one particle you can study the other.
Faster than light sort of communication
Their correlation somehow stretches over any distances

36. • The quantum world is unlike seen in anything
• One can never know where the electron is ,until you measure it :bohr
• Only by looking ,everything comes into existence
• Imagine there is a curtain between us and the quantum world.
• Only when we pull over the curtain and see everything seems to come
into a state OF REALITY
• This is known as the Copenhagen interpretation.
Einstein hated this….he thought there should be undelying theory behind
everything
• EVEN HE ASKED DOES THE MOON CEASE TO EXIST WHEN NOT
LOOKING AT IT?

37. John bell a great scientist with real courage and conviction tried to
experiment entanglement.
The experiments were carried out and repeated several times all around
the world.Each time they yielded consistent results.
The significance of these results were shocking
It proved EINSTEIN wrong
The entangled properties of subatomic particles were not prewritten
They come into existence only when measured
Something strange is linking them which truly defies commonsense
Whatever happens we don’t understand but that doesnt mean we should
stop looking