After the selection is made on a Tuesday in the middle of October, it is the custom of the Nobel Committee to inform the winners over the phone.
"Sometimes, the laureates, mostly those who are based in the US, are fast asleep in the middle of the night when they get calls. At other times, husbands or wives have to be informed about their spouses' achievements," Per Delsing, Chairman of the Nobel Committee for Physics, told PTI.
"I was at my home but was sleeping. And immediately there were continuous calls from journalists. So, there was no time for sleep or rest," he said in an interview.
There have been some more instances like this before, according to Delsing.
More From This Section
The Royal Swedish Academy of Sciences is responsible for the selection of Nobel Laureates in Physics.
The Academy appoints a working body, the Nobel Committee for Physics, which screens the nominations and presents a proposal for final candidates.
The selection procedure for Physics and Chemistry is same while that for Literature, Peace, Medicine and Economics is slightly different.
Delsing, a professor of physics at Chalmers University of Technology in Gothenburg, says the procedure to select a Nobel laureate in the field actually takes a whole year.
"Already in October this year, we had sent requests for nominations for next year's Nobel prizes. Every year, we sent out several thousands of requests to nominators around the world and we get several hundred nominations back. And these should reach us by January 31," he said.
"And it is really based on those nominations that we select the winner. One needs to be nominated to get the award. All nominations are made by individuals," Delsing said.