Video narration
Bacha hua khana garam hota hai, phir bhi microwave ki hawa thandi-si kyon rehti hai? Jab aap use phir garam karte hain, adrishya tarangein hawa se guzar kar khane mein pahunchti hain. Unka badalta vidyut asar paani aur khane ke doosre anuon ko hilata-dulata hai. Sokhi urja garmi banti hai. Oven ko hawa pehle garam nahin karni padti: khana tarangon ki urja seedhe sokhta hai. Isliye tarangein hawa paar karke bache hue khane ke anuon ko garam karti hain.