Salaah

Transparent burqa

Q: I would like to know what defines transparent according to Shar'iah. With regards to the burqa I wear for salaah if I put one layer in front of me I can see through it however when it is on my head the layer that falls in the back makes it dark. So one is unable to see through. Is it permissible to read salaah in such a burqa? If I wear it and stand in front of the mirror I am unable to see the shape of my hair or head in the mirror.

Sitting on a chair and performing Salaah

Q: Many persons due to medical reasons decide that they need to use a chair for Salah with Jamat and they do not consult a reputable scholar, thinking that a doctor's certification or a medical note is sufficient justification.

1. Is this rationale correct?

2. What is the status of a person's Salah in Shar'iah if he uses a chair for Salah when in fact he is not entitled to?

3. Exactly when is a person permitted to use a chair for Salah in Jamaat or otherwise?