😳 WHY? ❓❓
Why do fireworks burst in different colours?
The colours of fireworks come from metal salts packed inside them. When the gunpowder charge explodes, the intense heat excites electrons in the metal atoms to higher energy levels; as they fall back, they release that energy as light of a particular colour. Each metal gives its own colour: strontium salts glow red, sodium yellow, barium green and copper blue, while a mix of strontium and copper gives purple. Burning metals such as magnesium, aluminium and titanium give bright white sparks. That is why chemists can ‘paint’ the night sky by choosing the right compounds.
📚 GK TODAY
8 November — Important Days
World Radiography Day: Marks the anniversary of German physicist Wilhelm Conrad Röntgen’s discovery of X-rays on 8 November 1895. It honours radiographers and radiologists and highlights the role of medical imaging in safe diagnosis and treatment.
* World Urbanism Day
Also called World Town Planning Day, it was started in 1949 by Argentine professor Carlos María della Paolera to promote planning for liveable, sustainable cities and to recognise the work of urban planners.
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🐣💐 BORN TODAY
L.K. Advani (born 8 November 1927)
Lal Krishna Advani was born in Karachi, Sindh (then British India). A founding member of the BJP in 1980 and its president three times, he led the Ram Rath Yatra from Somnath in 1990. He served as Union Home Minister (1998–2004) and Deputy Prime Minister (2002–04), and was conferred the Bharat Ratna in 2024. He turns 99 today, and the BJP is holding a hawan for his good health at its headquarters.
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IDIOMS & PHRASES
“Burn the midnight oil”
Meaning: To work or study late into the night.
Example: With CBSE board exams beginning on 16 February 2027, students will soon be burning the midnight oil.
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📖 SYNONYMS & ANTONYMS
* Pervasive: Widespread × Limited
* Rusticate: Expel × Admit
* Illuminate: Brighten × Darken
🧬 HEALTH CARE: HEALTHY HABITS 🩺
A healthy, safe Diwali
🍬 Enjoy sweets in small portions; prefer fresh home-made ones and watch sugar if you are diabetic.
🎆 Burst crackers only in open spaces, keep a bucket of water or sand nearby and wear cotton clothes, not synthetics.
👀 Keep children at a safe distance; if a spark hits the eye, rinse with clean water and see a doctor — do not rub.
🐶 Shield pets, elderly people and infants from loud noise and smoke by keeping them indoors in a quiet room.
😷 With Delhi-NCR air forecast to turn ‘Severe’, people with asthma or heart disease should stay indoors and keep medicines handy.
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Ms. Pooja, |
