Question : The scientists of which of the following countries have developed the world’s sharpest laser.
(a) America
(b) Germany
(c) France
(d) China
Answer- (b)
Related facts:
- On July 2, 2017, scientists of Germany developed the world’s sharpest laser.
- This laser has a linewidth of only 10 miliHertz (mHz) – closer to the ideal laser than ever before.
- This precision is useful for various applications such as optical atomic clocks, precision spectroscopy, radio astronomy and for testing the Einstein’s theory of relativity.
- Lasers produce a narrow beam of light. Importantly, the word ‘laser’ stand for Light Amplification by Stimulated Emission of Radiation.
Reference:
http://indiatoday.intoday.in/story/worlds-sharpest-laser-developed/1/992467.html
https://spaceplace.nasa.gov/laser/en/