Obtaining a PhD in physics with a BS in physics and an MS in engineering requires significant dedication and effort, regardless of prior qualifications. Acceptance into a PhD program may not be harder due to the applicant's background, as demonstrated graduate coursework and potential thesis work can positively influence selection committees. However, completion of the program remains challenging, as candidates will need to undertake additional physics coursework, and their engineering background may not fully prepare them for the core physics curriculum. The focus of a PhD is primarily on research, which can be demanding and time-consuming, making the journey rigorous regardless of previous academic achievements.