The physics prize has been awarded to three people.
The winner was announced by the secretary general of the Royal Swedish Academy of Sciences.
Physicists often tackle problems that appear to be far away from everyday concerns, such as tiny particles and the vast mysteries of space and time, but their research provides the foundations for many practical applications of science.
Three scientists were awarded the prize last year for their work that has helped to explain and predict complex forces of nature.
On Monday, the first day of the week, Swedish scientist Svante Paabo received the medicine prize for his discovery of the secrets of Neanderthal genes.
On Wednesday and Thursday, chemistry and literature will be covered. The economics award and the peace prize will be announced in October.