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1. MODERN PHYSICS

2. Modern physics is a branch of physics that deals with
The topic where matter and energy are not separate, but it is an
alternate form of each other.
Relativity
Quantum

3. FATHER OF MODERN
PHYSICS
Albert Einstein is known as the
father of modern physics
He was a 20th century scientist
Theory of relativity and
The famous equation E=mc2
Novel for Photoelectric effect

4. PHOTOELECTRIC EFFECT

5. EVOLUTION OF
THE ATOMIC
MODEL

6. DALTON`S THEORY
Atoms are tiny, invisible particles
Atoms of one element are all the
same
Atoms of different elements are
different
Compounds form by combining
atoms

7. J.J. THOMSON`S THEORY
 Thomson discovered electrons.
 He was the first scientist to show that the atom
was made of even smaller things
 He also proposed the existence of a ( + ) particle
 His atomic model was known as the “Raisin Bun
Model”

8. THOMSON’S MODEL
• Atoms are made mostly out
of (+)charged material, like
dough in a bun.
• The (-) charged electrons
are found inside the (+)
dough.

9. ERNEST RUTHERFORD
Rutherford discovered protons and the
nucleus.
• He showed that atoms have (+)
particles in the center, and are mostly
empty space.
• He called these (+) particles protons.
• He called the center of atoms the
nucleus.

10. RUTHERFORD’S EXPERIMENT
Radioactive material
emits beam of (+) alpha
particles
ScreenGold foil
Strangely, some
particles are deflected
Most particles went
right through!

11. NIELS BOHR
Niels Bohr improved on
Rutherford’s model.
• He proposed that electrons move
around the nucleus in specific
layers, or shells.
• Every atom has a specific number
of electron shells.

12. THE CURRENT ATOMIC MODEL
Protons
Neutrons
Electrons

13. RADIO ACTIVITY

14. ALPHA DECAY

15. BETA DECAY

16. GAMMA DECAY

17. NUCLEAR REACTION
The reaction by which the changes take place
in the nucleus of the reactant and completely
different atoms are produced as the product
is called nuclear reaction.

18. NUCLEAR FISSION

19. NUCLEAR FUSION

21. Name: Md.Touhidul Islam Shawan
Studying B.Sc. In Computer Science and
Engineering at Daffodil International
University
FB: www.facebook.com/touhidulshaon
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