National Science Day is celebrated in India every year on February 28th to commemorate the discovery of the Raman Effect by physicist C.V. Raman. For this scientific achievement, Raman was awarded the Nobel Prize in Physics in 1930. The day aims to spread awareness of the importance of science and encourage scientific temper in the country. Events include science fairs, exhibitions, lectures and competitions held in schools and institutions across India.

2. National Science Day
is celebrated all over India
with great enthusiasm on
28th of February every year in
order to commemorate the
invention of the Raman Effect
in India by the Indian
physicist, Sir Chandrasekhara
Venkata Raman. For his great
success in the field of science
in India, Chandrasekhara
Venkata Raman was awarded
and honoured with the Nobel
Prize in the Physics in the
year 1930.

3. Chandrasekhar Venkata Raman
Sir Chandrasekhara Venkata Raman, was
an Indian physicist, born in the former Madras
Province, whose ground breaking work in the field
of light scattering earned him the 1930Nobel Prize
for Physics. He discovered that, when light
traverses a transparent material, some of the
deflected light changes in wavelength. This
phenomenon is now called Raman scattering and is
the result of the Raman effect .In 1954, he was
honoured with the highest civilian award in India,
the Bharat Ratna.

4. Raman Effect
Raman effect, change in
the wavelength of light that occurs when a light
beam is deflected by molecules. When a beam of
light traverses a dust-free, transparent sample
of a chemical compound, a small fraction of the
light emerges in directions other than that of the
incident (incoming) beam. Most of this scattered
light is of unchanged wavelength. A small part,
however, has wavelengths different from that of
the incident light; its presence is a result of the
Raman effect.

5. Applications of Raman Effect
Technique gives or can generate Fingerprint of
Universe.
Raman Spectroscopy – Material Analysis.
Raman Scanners to diagnose diseased cell, organ
etc.
Detection of explosives.
Detection of drugs such as steroids, cocaine
etc.
NDE for chemical analysis.
Force constant & Bond length.
Gas analyzer for anaesthesia.

6. Objectives of Celebrating
National Science Day
• National Science Day is being celebrated every year to
widely spread a message about the significance of
scientific applications in the daily life of the people.
• To display the all the activities, efforts and
achievements in the field of science for human welfare.
• To discuss all the issues and implement new technologies
for the development of the science.
• To give an opportunity to the scientific minded citizens
in the country.
• To encourage the people as well as popularize the
Science and Technology.

7. How National Science Day is
Celebrated
National science day is celebrated as one of the
main science festivals in India every year during
which students of the schools and colleges
demonstrates various science projects as well as
national and state science institutions
demonstrates their latest researches. The
celebration also includes public speech, radio-TV
talk shows, exhibitions of science movie, science
exhibition based on themes and concepts, watching
night sky, live projects and researches
demonstration, debates, quiz competitions,
lectures, science models exhibitions and many
more activities.

8. Themes of National Science Day
• The theme of the year 1999 was “Our Changing Earth”.
• The theme of the year 2000 was “Recreating Interest
in Basic Science”.
• The theme of the year 2001 was “Information
Technology for Science Education”.
• The theme of the year 2002 was “Wealth from
Waste”.
• The theme of the year 2003 was “50 years of DNA &
25 years of IVF – The blue print of Life”.
• The theme of the year 2004 was “Encouraging
Scientific Awareness in Community”.
• The theme of the year 2005 was “Celebrating Physics”.
• The theme of the year 2006 was “Nurture Nature for
our future”.

9. • The theme of the year 2007 was “More Crop Per
Drop”.
• The theme of the year 2008 was “Understanding the
Planet Earth”.
• The theme of the year 2009 was “Expanding
Horizons of Science”.
• The theme of the year 2010 was “Gender Equity,
Science & Technology for Sustainable Development”.
• The theme of the year 2011 was “Chemistry in Daily
Life”.
• The theme of the year 2012 was “Clean Energy
Options and Nuclear Safety”.
• The theme of the year 2013 was “Genetically
Modified Crops and Food Security”.
• The theme of the year 2014 was “Fostering
Scientific Temper”.

10. Theme of the year 2015 is.......
“Science for Nation
Building”

11. National Science Day 2015

12. Scientific Temper
• The attitude of questioning and reasoning.
• It’s approach of Believing, only facts supported by relevant
evidences. Where these evidences are derived from
observation, Logical interpretation and Conclusion made
from experiment or experience which is repeatable under
similar condition.
• Believing things to the extent of evidence availability.
• Scientific Temper is a true path finder & guide for our life.
• It’s not only complex scientific methodology but it’s built on
solid base of humility, freedom, courage, fearlessness &
humanity.
• It’s thought process which believes Universe runs on it’s own
by natural laws.

13. Importance of Scientific Temper
• Scientific Temper will lead to develop, attitude
of questioning and reasoning in every citizen,
such attitude will boost countries techno-social
development .
• Scientific Temper made human understand :
--- There is reason behind every happening.
--- This reason can be understood by Human.
--- The efficiency of approach & availability of
right resources will decide time, completeness
& correctness of explanation.
--- This is the surest way to obtain the correct
explanation for unknown happenings.

14. What can be Done to Promote
Scientific Temper
• Education / Science based Education.
• Every individual needs to understand & try
to develop this attitude as a constitutional
duty.
• Think, about Scientific Temper, Speak &
implement. The same.
• On mass scale following is normally done; --
- Science Exhibitions. --- Essay & Elocution
on Science, inventions, Scientist etc. ---
Poster competition.

15. What can be Done to Promote
Scientific Temper
• Additionally this needs to be done;
--- Arranging Reformative talks / Science Lectures
(Audio/Visual).
--- Arranging visits to nearby Science centres & Industries.
--- Ensuring availability of Science books viz. science made
easy, experimental science.
--- Science shows & Demonstrations (Science toys by Dr
Arvind Gupta).
--- Providing activity kits.
--- Snakes Shows / Birds-Butterflies watching visits.

16. Message On National Science
Day-2015
• You are future builders of India.
• Then you must have a scientific temper
and know what is method of science and
develop a habit to mould your activities
accordingly .
• But this habit does not always come
naturally; they have to be practiced.