I am a Pure Mathematics senior undergraduate student at the university, and I am planning to change my major for master's degree, and one of my alternatives is Cosmology. The problem is that I do not have any background in Physics in general and in Cosmology in particular. In this regard, I have some questions:
$1-$ Is it vital for me to hold a bachelor's in Physics or I can manage the essential courses on my own?
$2-$ Which topics in Physics should I be familiar with to start master's degree is Cosmology?
$3-$ Approximately, How much time does learning these topics take?
$4-$ Which books do you recommend for starting with? and which books do you recommend for gaining further knowledge? (PS: as I can get all of these books out of our university, the price of them is not a factor)
I would really appreciate it if someone could possibly help me find my way!
