Superconductors
Why are superconductors a big deal in modern physics?
Why do we store dry ice in special containers?
Dry ice is just frozen CO₂. Why handle it differently?
Faraday’s law
How does a bicycle dynamo light up your headlamp without batteries?
Can we smell hot food faster than cold food?
Why does biryani’s aroma reach you faster when it’s hot?
Total internal reflection
Why do diamonds sparkle so much?
What is the law of conservation of mass?
If we burn wood, doesn’t the mass disappear in smoke?
Lenses
Why do my spectacles fog up when I come indoors from the cold?
Why is Avogadro’s number so huge?
6.022×10236.022 \times 10^{23} particles in one mole — why such a big number?
Photoelectric effect
Why do automatic doors open when you walk up to them?
How to calculate molecular mass easily?
For example, what’s the molecular mass of H₂O?
Nuclear fusion
Why is fusion considered the “holy grail” of clean energy?
Why is valency important in writing formulas?
Why do we write H₂O, not HO₂?
Lasers in medicine
How do lasers perform delicate eye surgeries without cutting?
What happens if we mix 1 mole of hydrogen with 1 mole of oxygen?
Do we directly get H₂O?
Uniform motion
A train moves at 60 km/h for 2 hours. Is its motion uniform?
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