How is the ring around Sun or Moon formed?


The clear night skies are often mesmerizing. They have served as inspiration for many poets .The ring formed around it has its own story roo. The ring is the spectrum of seven colors.
Its called the halo.
These are caused by the cirrus clouds.( the clouds which are found at the highest altitude in the atmosphere, 20k feet abv).These clouds have millions of ice crystals so they split light by refraction and reflection. They are visible for both sun as well as the moon.
In olden days citing of halo  considered as harbinger of rain,from there itself ‘ring around the moon’ phrase was started meaning it is about to rain soon. Fun fact is that halo appear in clear sky but they are actually caused by clouds high above ( which are alomst invisible to us)..

Why do we need Oil to fry food?


What is common in fried chicken, french fries and potato chips? Yes, they all are fried and savor your taste buds despite being totally unhealthy. Everyone knows fried food has enough calories to make your dream of perfect body shatter into pieces. So why can’t you just use calorie-less substances like water to fry food? Ever wondered?

Well the answer lies in boiling point. The crisp and crunch of fried cuisine is because of the water contained in them in occluded form or simply water of hydration gets evaporated (water of hydration means water is attached in the food molecules such that even after evaporation the chemical composition remains same ).

In order to remove this water, food is to be heated beyond boiling point of water (i.e. 100oC ).This can’t be done with water as medium as it would also get evaporated.

Hence, the oil servers two purpose –

  • The oil can be heated upto 150 oC without charring the food.
  • Being non volatile at this temperature , heat from oil helps in frying.

The reason was quite simple and logical. Isn’t it?  🙂

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