display the name separated with single cell using sql server

Question

  Empid Empname Salary

1 Ram 15000
2 Ramesh 20000
3 Ravi 25000
4 Sam 30000
5 Ganesh 35000


i want to display Empname in single cell separated with space.

i want the output as follows Empname in single cell


Ram Ramesh Ravi Sam Ganesh.

for that how to write the query in sql server.