Yes, reading law journals and publications can be extremely helpful in understanding the legal dimensions of international human rights laws for UPSC Law Optional subject. Here is a detailed explanation:

1. Comprehensive and updated information:
- Law journals and publications provide comprehensive and up-to-date information on various aspects of international human rights laws. They cover recent developments, case studies, analyses, and scholarly articles by experts in the field.
- By reading these materials, you can stay updated with the latest legal developments, emerging trends, and important judgments related to international human rights laws. This knowledge is crucial for answering questions related to the subject in the UPSC Law Optional exam.

2. In-depth analysis and interpretations:
- Law journals and publications present in-depth analysis and interpretations of international human rights laws. They explore the legal dimensions, principles, and concepts in detail, helping you to develop a deep understanding of the subject.
- These materials often provide critical insights, different perspectives, and debates on various legal issues, allowing you to form a well-rounded understanding of the subject matter.

3. Case studies and practical examples:
- Reading law journals and publications can expose you to numerous case studies and practical examples related to international human rights laws. These real-life scenarios help you understand the practical application of legal principles and concepts.
- By analyzing these cases, you can develop the ability to apply legal provisions to factual situations, which is a crucial skill required for answering questions in the UPSC Law Optional exam.

4. Scholarly articles and expert opinions:
- Law journals and publications often include scholarly articles written by experts in the field of international human rights laws. These articles provide a deep insight into various aspects of the subject, including theoretical perspectives, historical background, and future trends.
- By reading these articles, you can gain valuable insights, arguments, and opinions from renowned legal scholars. This exposure to expert opinions can enhance your critical thinking skills and enable you to present well-informed arguments in your exam answers.

5. Source of reference for further study:
- Law journals and publications serve as an excellent source of reference for further study. They often contain references to relevant statutes, international treaties, conventions, and case laws, allowing you to delve deeper into specific topics.
- By using these references, you can expand your knowledge base, strengthen your understanding of legal provisions, and develop a more nuanced perspective on international human rights laws.

Conclusion:
In conclusion, reading law journals and publications is highly beneficial for understanding the legal dimensions of international human rights laws for the UPSC Law Optional subject. These materials provide comprehensive information, in-depth analysis, case studies, expert opinions, and serve as a valuable source of reference for further study. By incorporating these resources into your exam preparation, you can enhance your knowledge, analytical skills, and ability to tackle questions related to international human rights laws effectively.