I graduate from a UK university recently. I intend to apply MS physics degree in the US . Although I got a First (equivalent to Grade A/GPA 4.0 in the US) in BSc Theoretical Physics .I have never worked in a research group during undergraduate. I didn't have any research experience apart from university coursework. I worry that will be my 'Dead End' of Master application. I wonder is research experience important for physics grad school admission ? (MS degree in physics) .