Correct Answer - Option 4 : Rontgen
- X - rays are a form of electromagnetic radiation.
- They are transmitted in waves or particles at different wavelengths and frequencies.
- This broad range of wavelengths is known as the electromagnetic spectrum.
- Most X-rays have a wavelength ranging from 0.1 to 10 nanometres.
- The EM spectrum is generally divided into seven regions in order of decreasing wavelength and increasing energy and frequency.
Wilhelm Conrad Rontgen:
- He was the recipient of the first Nobel Prize for Physics in 1901.
- His discovery of X rays revolutionised the fields of physics and medicine.
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He discovered X rays radiation.
- In honour of Rontgen's accomplishments, in 2004 the International Union of Pure and Applied Chemistry (IUPAC) named element 111, roentgenium, a radioactive element with multiple unstable isotopes, after him.
- The unit of measurement roentgen was also named after him.
Thus, Rontgen discovered "X-Rays":
Anderson:
- Phillip Anderson, was an American Nobel laureate.
- He received Nobel Prize in Physics in 1977, along with Nevill Francis Mott of Britain and John Hasbrouck van Vleck of America.
- Phillip contributed to the understanding of fundamental theoretical investigations of the electronic structure of magnetic and disordered systems.
Einstein:
- The Nobel Prize in physics in 1921 was awarded to Albert Einstein for his services to theoretical physics.
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He is especially credited for the discovery of the law of the Photoelectric effect.
- He is known for developing the theory of relativity which is among the most important developments for the theory of quantum mechanics.
Goldstein:
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Protons were discovered by E. Goldstein.
