Q. Which of the following reduces heat transfer by radiation?

निम्नलिखित में से कौन विकिरण द्वारा ऊष्मा स्थानांतरण को कम करता है?

A
Air gap
वायु अंतराल
B
Black coating
काली कोटिंग
C
Shiny surface
चमकदार सतह
D
Thick wall
मोटी दीवार

Explanation

Shiny and reflective surfaces reduce heat transfer by radiation because they reflect infrared radiation.
This is why thermal blankets and flasks have shiny linings.

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