Which one of the following statements regarding a thermos flask is NOT correct ........

General Science (NDA) Physics

Which one of the following statements regarding a thermos flask is NOT correct?

The walls of flask are separated by vacuum and made of glass which is a poor conductor of heat

The glass walls themselves have shiny surfaces

The surface of inner wall radiates good amount of heat and the surface of outer wall absorbs some of the heat that is radiated from the inner wall

The cork supports are poor conductors of heat

Explanation:

The walls of thermos flask are separated by vacuum and made of glass which is poor conductor of heat.The glass walls themselves have shiny surfaces. The radiation emitted by inner wall and that absorbed by outer wall, both are negligible. The cork supports are poor conductors of heat.