PPT ON CONTRIBUTIONS OF MEGHNAD SAHA, PREPARED BY ARCHANA BABU B.Ed TRAINEE, KUCTE ARYAD,ALAPPUZHA KERALA.

1. Presented by
Archana Babu

6. 

7. .

8. 1905-1915
•Obtained many
scholarships.
•Completed MSc in
applied mathematics

9. .
.

11.  Sathyendranath Bose was his
colleague.
They were familiar with the
revolutionary developments:
Max Planck’s Quantum theory
Neils Bohr’s atom model
Einstein's theory of relativity
etc.

19. CONTRIBUTIONS

22. Log ( x2/1-x3 ) P = U/2/3 RT + 2.5 Log T – 6.5
X- fraction of ionised atom
P- total pressure
U- heat of ionisation
R- universal gas constant
T-temperature in kelvin
Calculated ionisation potential of Ca,Ba,Sr,H,He etc
under various temperature and pressure.

23. Using this equation Saha
was not only able to
explain many aspects of
solar spectrum, but also
the varied nature of
stellar spectra and give
physical interpretation to
the spectral sequence.

24. The four papers which obtained world
wide reputation were:
Ionisation of the solar
chromosphere.
( Thermal Ionisation Theory)
On elements of the sun.
On the problems of temperature-
radiation of gases.
On the Harvard classification of
stars.
(On a physical theory of stellar
spectra)

25. Saha’s formula gave
insight into the interior of
the sun and stars, and their
chemical compositions,
densities of various
elements and gravitational
force on their surfaces.

26. OTHER CONTRIBUTIONS
Atomic and molecular
spectroscopy
Nuclear physics
Propogation of radio waves
Age of rocks,
water management
National planning.

27. OTHER CONTRIBUTIONS

30. MEGHNAD SAHA WAS A MAN
WHO PREFERS PLAIN-SPEAKING
AND NOTHING BUT THE TRUTH.