Applications Of Modern Physics -
When Einstein proposed in 1917 (the theoretical foundation of the laser), it was a purely theoretical curiosity. For 40 years, it was "a solution looking for a problem." Today, lasers are ubiquitous.
When Einstein proposed in 1917 (the theoretical foundation of the laser), it was a purely theoretical curiosity. For 40 years, it was "a solution looking for a problem." Today, lasers are ubiquitous.