Question

what is the use of silvering the walls of thermos flask?​

Answer 1

Explanation:

A thermos flask is used to keep a hot liquid hot and a cold liquid cold for a long time.

so silvering the walls of thermos flask is done.

Answer 2

               Use of silvering the walls of Thermos flask

• The double-walled vacuum bottle of a thermos flask is silvered on its inner walls to retain the heat inside.
• heat radiated is reflected by the silver walls to the inside of the vacuum bottle.
• The outer and inner walls have vacuum in between them which prevents heat transfer to outside either through conduction or convection.
• The shiny silvery surface prevents any gain or loss of heat through radiation.
• The action of silvery walls in a flask is similar to that of a space blanket.