Introduction:
The IIT JAM Physics (Joint Admission Test for M.Sc. in Physics) is a national-level entrance exam conducted by the Indian Institutes of Technology (IITs) for admission to various postgraduate programs in physics. While the exam primarily targets students with a physics background, candidates from non-physics backgrounds can also appear for the exam and secure admission to physics courses in IITs. However, there are certain eligibility criteria and factors to consider in such cases.

Eligibility Criteria:
To be eligible for IIT JAM Physics, candidates must have completed a Bachelor's degree with at least 55% aggregate marks (50% for candidates from reserved categories). While a physics background is not mandatory, candidates must have studied mathematics at the undergraduate level. Additionally, some IITs may have specific eligibility criteria for candidates from non-physics backgrounds, such as requiring them to have studied a certain number of physics-related courses.

Preparation:
Candidates from non-physics backgrounds may face additional challenges in preparing for the IIT JAM Physics exam. It is crucial for them to have a solid understanding of the fundamental concepts of physics and mathematics. They should focus on topics such as mechanics, electricity and magnetism, quantum mechanics, thermodynamics, and mathematical methods in physics. It is recommended to refer to standard textbooks and study materials for thorough preparation.

Exam Pattern:
The IIT JAM Physics exam consists of multiple-choice questions (MCQs) and numerical answer type (NAT) questions. The MCQs have negative marking for wrong answers, while the NAT questions do not. The exam evaluates the candidate's understanding of various physics concepts, mathematical skills, and problem-solving abilities.

Score and Admission:
After the exam, candidates' scores are released in the form of All India Ranks (AIRs). Based on these ranks, candidates can apply for admission to various M.Sc. programs in physics offered by the participating IITs. The IITs release their own cutoff ranks for each program, and candidates falling within the cutoff are called for further rounds such as interviews or counseling. The final admission decision is based on the candidate's performance in these rounds.

Conclusion:
In summary, it is possible for candidates from non-physics backgrounds to secure admission to physics courses in IITs through the IIT JAM Physics exam. However, they must meet the eligibility criteria, prepare thoroughly for the exam, and perform well to secure a good rank. It is essential for them to have a strong foundation in physics and mathematics to succeed in the exam and subsequent admission process.