Hitesh: Can you provide reference that married woman should cover their hair with dupatta as per Vedas? Also why wearing black colored clothes are considered Tamsik?
Swami Ram Swarup: The head and hair should be covered with dupatta. I also paste my article in this regard as under-

About wearing of clothes by ladies

Yajurveda clearly preaches for every lady to wear the clothes in a way that every part of her body except the face and hands; is covered completely. Nowadays, it is unfortunate that we have forgotten the preach of our holy granths and have adopted the culture of western countries. So, Atharvaveda mantras 2/13/2, 3 state that the objective to wear the clothes is to attain long life and to protect the mental and physical strength then only would we be able to attain long and happy life. Idea is that if we wear the clothes that attract people towards us and bad desires generate within their hearts then the objective to attain long life will be defeated. That is why, Yajurveda states to wear the clothes to cover the whole body.

Atharvaveda mantra 7/37/1 states that the wife should wear the clothes in a prudent manner.

To wear black clothes has no concern with tamsik vritti, clothes being non-alive matter.

Ramji: Sir, please give your suggestion if Rahu Saturn Venus in lagan Scorpio so what is effect, can you give some suggestions?
Swami Ram Swarup: Navgrah poojan does not exist in Vedas. Secondly, the said planets are non-alive matters and are made by God for our benefit. The said non-alive matters never harm us.

Vishal Kumar: Vivek Ka Sandhi Vichhed Qya hoga?
Swami Ram Swarup: Vi+Vik+ghain