Kya apne kabhi socha hai ki barf jo badi hi asani se high temp mein pighalna shuru ho jati hai.
Iske peeche ek kaafi simple si science hai, chalo isse samjhte hain. Microwave oven 2.45 GHz ki frequency par electromagnetic radiation emit karta hai, jo khane ko garam karne ke liye istemal hota hai. Ye microwaves khane mein maujood molecules ko 2.45 GHz ki speed se vibrate karne lagti hain, jisse molecules ke beech takraane se heat generate hoti hai, aur isi tarah khana garam hota hai.
Lekin ye phenomenon barf jaisi cheezon par kyun nahi lagoo hota? Barf aur paani mein hydrogen molecules ke judne se ek crystal type structure banta hai.
Molecules jab solid state mein hote hain, tab wo microwave radiation se hone wali vibrations ko absorb nahi karte. Jaise ki aap jaante hain, friction se heat produce hoti hai, aur agar molecules vibrate nahi kar rahe hain, to friction se heat bhi nahi hogi. Is wajah se barf ka temperature nahi badalta aur wo pighalti nahi hai, chahe aap usse 30 seconds ya 1 minute tak microwave mein rakhein.
Who invented microwave?
Percy Spencer, ek American engineer the, jinhone pehla microwave oven invent kiya, lekin unhone is modern kitchen staple ko banane ka plan nahi banaya tha. Spencer ne World War II ke dauran Raytheon Laboratories ke liye compact cavity magnetrons ka mass production karne ka system develop kiya.
Unhone compact cavity magnetron ki food heating capabilities ko ek accident ke through discover kiya. Jab woh radar sets ke saath kaam kar rahe the, tab unhone dekha ki unki pocket mein rakha chocolate bar pighal gaya. Is ghatna ne unhe experiments karne ke liye prerit kiya, aur unhone Raytheon ke saath milkar modern microwave oven banane ka kaam shuru kiya.
Spencer ne alag-alag khanon ko microwave radiation se garam karne ke liye experiments kiye, jisse unhe yeh samajh aaya ki microwaves khane ko kaise garam kar sakti hain. Is tarah se unka invention aaj ke samay ka ek zaroori aur convenient kitchen appliance ban gaya.
When was microwave invented?
Percy Spencer, ek self-taught engineer the, jinhone 1945 mein microwave oven ka pehla patent file kiya. Jab woh ek live radar set ke saath kaam kar rahe the, tab unhone dekha ki unki pocket mein rakha candy bar tezi se pighal raha hai. Yeh pighalne ka kaaran tha radar ka compact cavity magnetron tube, jo microwave signals emit karta tha.
Iss ghatna ne unhe khana garam karne ke liye magnetron tube ka istemal karne ka idea diya. Spencer ne popcorn aur ande jaise khanon ko garam karne ke liye experiments kiye. Unhone ek metal box banaya jisme microwaves ko contain kiya ja sakta tha, aur is box mein magnetron tube ka ek opening rakha jahan se tube andar aa sakti thi.
Spencer ne is metal box mein ek door bhi add kiya, aur is tarah se modern microwave oven ka rough model tayar hua. Is invention ne khana garam karne ka tareeqa badal diya aur aaj yeh har ghar mein istemal hota hai.
What was microwave originally made for?
Microwave ka asal maqsad radar signals emit karna tha, jo dushman ke aircraft aur ships ko detect karne ke liye istemal hota tha. Yeh compact cavity magnetron tube pehli baar 1940 mein Birmingham University, England mein banayi gayi thi.
World War II ke dauran, is tube ka istemal radar technology mein hota tha. Lekin 1945 mein, American engineer Percy Spencer ne is tube ki food heating capabilities ko aksar dekha. Unhone dekha ki jab woh magnetron ke paas hote the, tab unki pocket mein rakha chocolate bar pighal gaya.
Is ghatna ne unhe inspire kiya ki woh is technology ka istemal khana garam karne ke liye karein. Is tarah se microwave oven ka concept develop hua, jo aaj humare kitchens ka ek zaroori hissa hai.
History of microwaves
- 1940 mein, physicists John Randall aur Harry Boot ne Birmingham University, England mein cavity magnetron tube ka avishkar kiya, jo microwave ka core component hai. Is tube ka asal maqsad dushman ke aircraft aur ships ko detect karna tha, jo World War II ke dauran bahut zaroori tha.
- 1945 mein, American engineer Percy Spencer ne magnetron tube ke saath kaam karte waqt dekha ki unki pocket mein rakha chocolate bar pighal raha hai. Is ghatna ne unhe prerit kiya ki woh is technology ka istemal khana garam karne ke liye karein. Unhone corn kernels ke saath experiments kiye aur phir microwave oven ka pehla patent file kiya.
- 1946 mein, Raytheon ne pehla commercial microwave, RadaRange, becha, jo restaurants, large canteens aur ships’ galleys ke liye tha. Yeh microwave lagbhag chhe feet lamba tha, iska wazan 750 pounds se zyada tha, aur yeh 3,000 watts ka power use karta tha. Iski keemat lagbhag $5,000 thi.
- 1967 mein, pehla residential microwave market mein aaya, jo countertop microwave tha aur Amana dwara becha gaya. Is microwave ka power 115 watts tha aur iski keemat $500 ke aas-paas thi.
- 1970 ke dashak mein, microwave parts saste hone lage aur technological improvements ne residential microwaves ki cost ko kam kiya, jisse microwave kharidne ka trend badh gaya.
- 1986 tak, statistics ke mutabik, 25 pratishat American households ke paas microwave oven tha.
- 1997 tak, yeh sankhya badhkar 90 pratishat tak pahunch gayi, jisse yeh pata chalta hai ki microwave oven kitna popular ho gaya tha.
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