hi,

indian space research institute i.e ISRO hires every year for different position , in recent years it hires for scientist b positions, qualification prescribed as candidates must have passed bachelor of technology or bachelor of engineering course in relevant discipline with the qualifying marks. also for master degree holders like m.sc in chemistry, m.sc in physics, scientific officer, technical assistant recruitment is done. so if you go for msc in physics you have chances to appear in isro recruitment exam if it matches with your qualification. now there is no surety that every year recruitment would done on all of the category, time to time it depends on the organization authority and there demand of work force.  however after completing m.sc in physics you may work as a lecturer, scientific officer post , it would be best if you go for msc courses from iits, since it has excellent placement record.

hope you may understand.