कार्तिक मास कृष्ण पक्ष की चौदस,नर्क चतुर्दशी/रूप चौदस कहलाती है
इसदिन श्रीकृष्ण ने नरकासुर का वध कर१६०००कन्याओं को बंदीगृह से मुक्त कराया था !
Every #Hindu festival have a # Science along with it’s religious views.
Diwali falls at the time when autumn moves into winters, which is just after monsoons in India.
Monsoon is related to profileration fo a wide variety of insects , microbes , vector borne diseases etc .
When the sunlight becomes abundant in after clearing of the skies in September , many of these are destroyed but very small insects and microbes dont. They remain very safe in the crevices of the houses , damp places , dark corners of the house.Thus it becomes imperative to clean the houses – thatch kaccha houses with cowdung , salt water etc and painting the pakka houses with plaster , vitriol ,lime etc becuase both cowdung(of Indian breeds only) and lime are anti bacterial.
Still some microbes are left for which oil diyas are lighted in the entire house. The oils used are Mustard and /or Sesame oil , both of which are sufficiently pungent .The heat from the lamps & the odour finishes off the remaining microbes.
On the same way , Oil is applied on the body again which is Mustard oil for cleansing of the body.
Puranically doing this protects one from torments of the hell , which in modern world is akin to the torment one faces by infection & diseases.
Also , Sri Hanumaji finished off Ahiravan on this day!