The eligibility states:
Candidates must have a Bachelors Degree with Physics as one of the subjects in any discipline under 10+2+3 education pattern securing at least 55% marks in aggregate
Candidates who have qualified Bachelors Degree either with Physics, Chemistry and Mathematics combined or in Physics Honours or with B.Tech in Electronics/Electrical/Mechanical/Computer are also eligible.

So yes PCM is required.
Good luck.