Sunday, January 1, 2017

Why does a lamp burns brighter before it dies off ?

This question was inspired by a Tulu saying .

Tulu Saying ---

Tekkuna deepagu bolpu jaasti

ತೆಕ್ಕುನ ದೀಪಗು ಬೊಲ್ಪು ಜಾಸ್ತಿ . 


Translation ----

tekkuna deepa = ತೆಕ್ಕುನ ದೀಪ  = lamp which is going to die off / exhaust / blew off
bolpu = ಬೊಲ್ಪು  = light
jaasti = ಜಾಸ್ತಿ  = more

Summary ----

This saying states that the lamp / fire which is about to exhaust / die off gives looks more bright than usual . The light emitting by it is more in brightness compared to early stage.


The scientific explanation goes like this --------

When the fire is in its last stage , it has almost completely consumed the remaining air in its area. Air carries not only oxygen which will act as an oxidising agent , but also moisture.

If the fire is in a stage where there is less air for it to use , then it implies that there are less water droplets ( moisture ) too  .This makes the fire to gain heat .

This heat will energise the electrons . Hotter electrons will emit more light . Hence a lamp burns brighter before it dies off .



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