CV Raman reading skills reading text

1. DR. ANJAI AH
ASSI STANT P RO F E S S O R
ENGLI SH
C. V. RAMAN
UNIT 1

2. Johannes Gutenberg

4. Martin Cooper
(inventor)

5. UNIT I
RAMAN EFFECT

6. C.V.Raman
TheNobel laureate in physics

7. If something is
groundbreaking, it is very
new and
a big change from other
things of its type:

8. Tiruchirapalli….

9. CONTINUE 1
Born : Thiruchirapally , Tamilnadu
Education: Presidency College, Chennai
His Father : Physics teacher
He is interested in physics.
Post: Deputy Accountant General in
Calcutta.
1917- gave up his position
Joined as a Professor of Physics at
Calcutta University.
1930: Nobel Prize winner C.V. Raman

10. embark= to start something big or important
acquainted=knowing or being familiar with a person
Acoustic-optics is a branch of physics that studies the interactions between sound
waves and light waves, especially the diffraction of laser light by ultrasound (or sound
in general) through an ultrasonic grating.
Percussion/pəˈkʌʃ.ən/=
musical instruments that
you play by hitting them
with your hand or an object such as
a stick
pleasing/ˈpliː.zɪŋ/ giving
a feeling of satisfaction or enjoyment

13. Research on acoustics continue…..
 He continued his research on acoustics
 Besides the violin, he studied the Veena,
Tambura, Mridangam, Tabla and others…
Veena T
ambura Mridangam T
abla

14. CONTINUE 2
Pursued Scientific Studies @ Indian Association for
Cultivationof Sciences
Didn't give up on science but gave up accountant job to be a
professor of physics
Embarked first trip overseas to London
As delegate @ Universities Congress 1921
Made several acquaintances leading physicists
Started researching in optics & acoustics
Raman's passion towards physics was immense yet
mathematical relationships of instruments undeniable

15. Guess
Separating and dividing
Occurrence Change in the dircetion of light

18. A Nicol prism is a type of polarizer, an optical device
made from calcite crystal used to produce and analyse
plane polarized light. ... It finally leaves the prism as a
ray of plane-polarized light, undergoing another
refraction, as it exits the far right side of the prism

19. CONTINUE 3
Studied classical percussion for understanding mathematical
relationships of instruments
One Particular Sea Voyage brought entire change in his studies
& challenged already available theories / explanations .
Wasn't convinced with explanations rather he provided solid
proofs of why sea water is in blue color
It merely cannot be because of sky but because of scattering of
sunlight by water molecules
He proved his speculations by experimenting sea water on a
Nicol Prism - hence molecular diffraction

20. Irrefutable=impossible to prove wrong:
Affirmation=
a statement or sign that
something is true:

21. Raman @ Nobel
 Raman effect took his
team 4 more years
 They were confident in
1927
 Discovery on 28th
February….
 The famous Raman
effect….the light can
undergo a scattering
through a liquid
resulting in a change in
its frequency….
 The date is celebrated as
National Science Day
 Booked tickets to Europe
 He had to wait 2 years
 Received Nobel Prize for
Physics in 1930
 When he thought of India
as a British colony he
wept.

22. CONTINUE 4
His undying zeal & enthusiasm didn't stop with one experimental proof .
He began research in three areas:
1. The Scattering of Light by Liquids
2. The Scattering of X-rays by Liquids
3. The Viscosity of Liquids
He continued his research for proof; after 7 years of dedicated experiments
he was awarded Nobel Prize for his research in the field of Scattering of
Light by Liquids.
He claimed (1924) that he would win Nobel Prize,
submitted (1928) detailed notes along with explanation,
affirmed and addressed the gathering at South Indian Science
Association,
awarded the Nobel Prize in the year 1930

23. Nature…
It is a world popular scientific journal.

24. Deflect=to change direction after hitting so
mething, or to cause something to do this
Emerging/ɪˈmɜː.dʒɪŋ/
starting to exist:
essentially /ɪˈsen.ʃəl.i/ relating to the most important characteristic or ideas of something.

25. CONTINUE 5
So, What is Raman Effect
Light beam travels through a medium, deflected by the
molecules in the medium. That deflected molecules had a
different wavelenth & color from the natural phenomenon.,
which initiated study Raman Spectroscopy.
This Spectroscopy is found in lots of applications today like
study of molecular structure of compounds, hand-held
scanners for detecting drugs & explosives, in the
pharmaceutical industry and medical diagnostics etcetera

26. About Raman’sfather….
• Father was a lecturer in
Mrs.A.V.Narasimha Rao
College,Visakhapatanam.
• He taught Physics,
Mathematics & physical
geography
• Father was athletic man &
took active interest in
sports

27. Raman…anintelligent
 Raman was not physically strong
 But he was very
intelligent
 Preferred to read books always.

28. Raman – A great reader
Voracious reader
He felt the books were like old friends
He was mainly influenced by 3 books
Light of Asia by Edwin Arnold
The Elements of Euclid by Helmholtz
The Sensations of Tone by Helmholtz

29. Light of Asia by Edwin Arnold

30. The Elements of Euclid

31. The Sensations of Tone

32. Raman’s education at Presidencycollege

33. As a student in the PhysicsLab
Different thinking about Light Diffraction

34. Light diffraction

35. Experiment on light

36. IACS….
Raman spotted IACS(Indian
Association for the Cultivation of Science)
sign board and joined.
Performed the legendary
experiments on light.

37. Raman with his associates atIACS

38. Raman led a double life…..
Worked as a
finance
officer all day
Research at
IACS
until night

39. Research begins….
He was communicated with physicists
around the world
His papers published in international
journals
Gave lectures in Calcutta on his
experiments
He was Introduced live demonstrations in
Science.

40. Raman @ waves and sound
 He was fascinated by
waves and sound, and
seem to have carried in
his mind the memory of
reading Helmholtz’s
book in his school days.
 He was decisive to study
musical instruments.
 Explained the working of
Ektara

41. Playing Ektara…..

42. Acoustics - Waves …..

43. Raman’s Ektara…

44. The family of Musical instruments…..

45. Research on Violin….
 Took up violin for study
 First time a scientific
understanding was
established
 Raman’s studies on the violin
were extensive and published
a book entitled On the Mechanical
Theory of Vibrations of Musical
Instruments of the Violin family with
experimental Results : Part I

46. A Scientist thought on violin player…
• Mechanical violin player did not resemble
the instrument which we know
• It had all the essential features of the violin
• Stretched string-resonant box-the bow-
stroke length by adjusting the mechanical
wheel.
• This was first mechanical violin for
research
• He brought all essential parts from a cycle
shop to make mechanical violin.

47. Raman @ around1917….
 Got chance to move into
a full-fledged career in
physics around 1917
 Ashutosh Mookerjee(Vice –
chancellor of Calcutta university)
offered him as a Palit
Professor of physics.
 Raman had to give up his
job and higher income
 Problem he had to
overcome
 “A person who is
applying must have foreign
experience”
 The rule was dismissed
 Became an active member
in university activities

48. Raman with his scholars……

49. Calcutta University..

50. Raman’s brilliant students
Ramanathan K.S.Krishnan Suri Bhagavantam

51. University Congress at Oxford
• In 1921 he was given honorary doctorate
from Calcutta University
• Went overseas for the first time
• Visit to University Congress at Oxford
• During his voyage back to India he spent
hours watching the sea from the deck of
his ship.
• Struck by its colour

52. Raman’s discovery….
• Water molecule could
scatter light just like air
molecules
• His thought was a radical
in those days.
• In 1922 he wrote a
brilliant essay ‘The
Molecular Diffraction of
Light’
• He said light may exist in
quanta, that is, as mass
less particles of energy.

53. Raman @IIS
• Took up directorship
of Indian Institute of
Science@ Bangalore
• He stayed there until
he retired in 1948
• Equal time to
research and
organisational work
• Nurtured many good
students
• Never had a
temptation leaving the
country for a better
life…….

54. Raman from 1946 to 1970…..
• Devoted final years to
set up of the Raman
Research Institute in
Bangalore…..
• Running of the Indian
Academy of Science.
• Edited Current
Science &
proceedings of the
Academy journals…
• Died on 21
November,1970
• Funeral at the
institute campus itself.
• A solitary tree is
located……

55. Raman Research Institute….

56. Indian Academy of Sciences…

57. A solitary tree is located at Raman Research Institute……

58. Raman the great….
• Contributed to Indian science with his
deep and genuine passion for Physics
• He improvised from scratch….
• His determination, spirit and contributions
will remain special in the practice of
science in India…….

60. C.V RAMAN (USA/English)
https://www.youtube.com/watch?v
=3nnNDnE0GEc&feature=emb_logo

61. Thank you