UPSC Smart Study
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🔬National Science Day, February 28:
• National Science Day marks the discovery of the Raman effect by physicist C.V. Raman on February 28 in 1928.
• The first National Science Day was celebrated in 1968 when the government decided to commemorate the announcement of the discovery of the Raman effect and to encourage the development of a scientific mindset in the country.
• C.V. Raman became deeply engaged with the study of light scattering, conducting numerous experiments to observe how light behaved while it passed through different substances.
• This research led to his discovery of what is now known as the Raman effect on February 28, 1928.
• For this, he was knighted in 1929.
• In 1930, he became the first Asian to win a Nobel Prize for Physics.
□ What is the Raman effect?
• The Raman effect refers to the inelastic scattering of light by matter, resulting in a shift in the frequency of the scattered light.
• In simpler words, it is a change in the wavelength of light that occurs when a light beam is deflected by molecules.
• The Raman effect forms the basis for Raman spectroscopy, which is used by chemists and physicists to gain information about materials.
• National Science Day marks the discovery of the Raman effect by physicist C.V. Raman on February 28 in 1928.
• The first National Science Day was celebrated in 1968 when the government decided to commemorate the announcement of the discovery of the Raman effect and to encourage the development of a scientific mindset in the country.
• C.V. Raman became deeply engaged with the study of light scattering, conducting numerous experiments to observe how light behaved while it passed through different substances.
• This research led to his discovery of what is now known as the Raman effect on February 28, 1928.
• For this, he was knighted in 1929.
• In 1930, he became the first Asian to win a Nobel Prize for Physics.
□ What is the Raman effect?
• The Raman effect refers to the inelastic scattering of light by matter, resulting in a shift in the frequency of the scattered light.
• In simpler words, it is a change in the wavelength of light that occurs when a light beam is deflected by molecules.
• The Raman effect forms the basis for Raman spectroscopy, which is used by chemists and physicists to gain information about materials.
■ Rare copper plates from Vijayanagara Empire unveiled in Bengaluru:
• A set of copper plates dating back to early 15th Century from the reign of Devaraya I of the Sangama Dynasty were unveiled in Bengaluru.
• These plates have inscriptions written in Sanskrit and Kannada and Nagari characters and are unique as they were issued during the coronation of King Devaraya I.
• This is the first known coronation copper plate to emerge, alongside two others from the Maitraka Dynasty (found in Junagadh, Gujarat) and the Ganga Dynasty (found in Talakadu, Karnataka), which remain undeciphered.
• A set of copper plates dating back to early 15th Century from the reign of Devaraya I of the Sangama Dynasty were unveiled in Bengaluru.
• These plates have inscriptions written in Sanskrit and Kannada and Nagari characters and are unique as they were issued during the coronation of King Devaraya I.
• This is the first known coronation copper plate to emerge, alongside two others from the Maitraka Dynasty (found in Junagadh, Gujarat) and the Ganga Dynasty (found in Talakadu, Karnataka), which remain undeciphered.
■ Bhagavad Gita, Natyashastra added to UNESCO's Memory of World Register:
• The manuscripts of the Bhagavad Gita and Bharat Muni's Natyashastra are among 74 new documentary heritage collections added to UNESCO's Memory of the World Register, marking a significant recognition of India's cultural legacy.
• With the inclusion of the Gita and Natyashastra, India now has 14 entries in Unesco's prestigious Memory of the World Register, which aims to preserve documentary heritage of global significance
• The manuscripts of the Bhagavad Gita and Bharat Muni's Natyashastra are among 74 new documentary heritage collections added to UNESCO's Memory of the World Register, marking a significant recognition of India's cultural legacy.
• With the inclusion of the Gita and Natyashastra, India now has 14 entries in Unesco's prestigious Memory of the World Register, which aims to preserve documentary heritage of global significance
🌿 Ayurveda Day, September 23:
• Government of India has officially designated 23rd September as the date for celebrating Ayurveda Day each year.
• This change, notified through a Gazette Notification dated 23rd March 2025, marks a significant shift from the earlier practice of observing Ayurveda Day on Dhanteras, which follows a variable lunar calendar.
• The chosen date, 23rd September, coincides with the autumnal equinox, a day when day and night are nearly equal. This astronomical event symbolizes balance in nature, perfectly aligning with the Ayurvedic philosophy that emphasizes equilibrium between the mind, body, and spirit.
• Government of India has officially designated 23rd September as the date for celebrating Ayurveda Day each year.
• This change, notified through a Gazette Notification dated 23rd March 2025, marks a significant shift from the earlier practice of observing Ayurveda Day on Dhanteras, which follows a variable lunar calendar.
• The chosen date, 23rd September, coincides with the autumnal equinox, a day when day and night are nearly equal. This astronomical event symbolizes balance in nature, perfectly aligning with the Ayurvedic philosophy that emphasizes equilibrium between the mind, body, and spirit.
☀️ Sun Candle phenomenon:
• A sun candle which is also known as a sun pillar, is a rare atmospheric optical situation that takes place when ice crystals in the atmosphere reflect sunlight at just the right angle and result in forming a vertical column of light that appears to come from the sun. This effect is most commonly observed during sunrise or sunset when the sun is low on the horizon.
• A sun candle which is also known as a sun pillar, is a rare atmospheric optical situation that takes place when ice crystals in the atmosphere reflect sunlight at just the right angle and result in forming a vertical column of light that appears to come from the sun. This effect is most commonly observed during sunrise or sunset when the sun is low on the horizon.