Riaz needs a box which can absorb the heat from the sun very fast but lose it very slowly. How should the outer and the inner surface of the box be coloured so that he gets the best result?

Outer - Silver, Inner - Silver

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Outer - Black, Inner - Black

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Outer - Silver, Inner - Black

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Outer - Black, Inner - Silver

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Solution

The correct option is D Outer - Black, Inner - Silver
The outer surface should be black as more heat from the sun should be absorbed.
The inner surface should be coated with silver so that most of the heat is retained into the box.

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Similar questions

Riaz needs a box which can absorb heat from the sun very fast but lose it very slowly. How should the outer and the inner surfaces of the box be coloured so that he gets the best result?

Q. Amit wants a box which can absorb the heat from the sun very quickly but lose it very slowly. How should outer and the inner surface of the box be coloured so that he gets the best result?

अमित को एक बक्से की आवश्यकता है, जो सूर्य से आने वाली ऊष्मा का बहुत शीघ्रता से अवशोषण कर सके, लेकिन इसे बहुत धीरे-धीरे उत्सर्जित करे। बक्से के बाह्य तथा आन्तरिक पृष्ठ को किस प्रकार रंगा जाना चाहिए ताकि उसे सबसे अच्छा परिणाम प्राप्त हो?

What side of a convex mirror should be silvered -- inner or outer?

Q. Amit wants a box which can absorb the heat from the sun very quickly but lose it very slowly. How should the box be coloured so that he gets the best result?

अमित को एक बक्से की आवश्यकता है, जो सूर्य से आने वाली ऊष्मा का बहुत शीघ्रता से अवशोषण कर सके, लेकिन इसे बहुत धीरे-धीरे उत्सर्जित करे। बक्से को किस प्रकार रंगा जाना चाहिए ताकि उसे सबसे अच्छा परिणाम प्राप्त हो?

Q. The inner side of the outer wall and outer side of the inner wall of a thermos flask is silvered. Why?

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Riaz needs a box which can absorb the heat from the sun very fast but lose it very slowly. How should the outer and the inner surface of the box be coloured so that he gets the best result?

The correct option is D Outer - Black, Inner - SilverThe outer surface should be black as more heat from the sun should be absorbed. The inner surface should be coated with silver so that most of the heat is retained into the box.

The correct option is D Outer - Black, Inner - Silver
The outer surface should be black as more heat from the sun should be absorbed.
The inner surface should be coated with silver so that most of the heat is retained into the box.