Interactive 3d graphics course - https://www.udacity.com/wiki/cs291/syllabus has all the information which is in Real time rendering book - http://www.amazon.com/Real-Time-Rendering-Third-Tomas-Akenine-Moller/dp/1568814240/ref=sr_1_1?s=books&ie=UTF8&qid=1427689300&sr=1-1&keywords=real+time+rendering or Vice-versa?

I mean which is more comprehensive and extensive, which has more deep knowledge(physics and mathematics) content?

The book surely go deeper and it covers more topics. The course is however good if you are starting with 3D graphics since you have to complete programming exercises and gives you instant feedbacks. If you already have some knowledge you may find it quite easy and maybe also boring however (I enrolled in the course to learn a little of WebGL and three.js).