Question

व्हाई इज द ग्लास बॉटल हैंड इन अ प्लेस इंसाइड द मेटल केस विद द हेल्प ऑफ वर्क ऑफ पीस इन थरमस फ्लास्क​

Answer 1

Answer:

In a thermos flask ,

(a) a thin layer of vacuum is provided between the two walls of flask, to minimise the heat loss by conduction , because for conduction medium (molecules) is required , but now medium is absent .

.(b) the two walls are silvered to minimise the heat loss by radiation , because a shiny surface is a bad absorber and bad emitter of radiation i.e. good reflector of heat , so prevents the heat exchange between content of flask and surrounding