A: The original author was N. Subramaniam. After his passing, Professor Brijlal revised the text, updated the units to SI, and added modern chapters on quantum statistics.
: First, check if the book is available on official platforms like Google Books, Amazon, or the publisher's website. Sometimes, you can preview or even download a free PDF if the book is open-access or the publisher provides a digital version. A: The original author was N
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