Atomic and Nuclear Physics
X-rays can pass through
Explanation: X-rays can pass through Carbon andCalcium, but they are largely absorbed by (B) Gold and (C) Lead, with lead being the most effective in blocking X-rays.
___ rays are used in the treatment of skin disorders.
Explanation: Ultraviolet (UV) rays are used in the treatment of various skin disorders, such as psoriasis, eczema, and vitiligo, through phototherapy.
Protons and neutrons in the nucleus are called as
Explanation: Nucleons refer to the protons and neutrons present in the nucleus of an atom.
Particles like mesons were discovered from
Explanation: Mesons were first discovered in cosmic ray showers, where high-energy cosmic rays collide with atmospheric particles, creating secondary particles, including mesons.
Key Points:
Cosmic Ray Showers: High-energy cosmic rays from space interact with Earth's atmosphere, producing a cascade of secondary particles, including mesons.
Discovery of Mesons: The pion (π-meson) was first discovered in cosmic rays, confirming Yukawa's theory of nuclear forces.
Who named the ionising radiations from outer cosmos as cosmic rays?
Explanation: Robert A. Millikan named the ionizing radiations from outer space as cosmic rays in the early 20th century while studying high-energy radiation penetrating the Earth's atmosphere.
The principle used in Atom bomb is
Explanation: The atom bomb works on the principle of nuclear fission, where a heavy nucleus (like uranium-235 or plutonium-239) splits into smaller nuclei, releasing a huge amount of energy in the form of an explosion.
1 amu is equal to