The famous physicist Victor Franz Hess is known for the discovery of:

Question

Question

This question was previously asked in

SSC CGL 2023 Tier-I Official Paper (Held On: 19 Jul 2023 Shift 1)

Answer 1

The correct answer is cosmic radiation.

Key Points

Cosmic Radiation:-
- These are high-energy particles that travel through space and bombard Earth's atmosphere.
- They were discovered by Victor Franz Hess in 1912, when he made a series of balloon ascents to measure the ionization of the atmosphere at different altitudes. (Hence option 1 is correct).
- He found that the ionization increased with altitude, even though the atmosphere becomes less dense at higher altitudes.
- This led him to conclude that there must be a source of radiation coming from outside the atmosphere.

Additional Information

Quantum statistics:-
- It is the application of statistical mechanics to quantum mechanical systems.
- It describes the behavior of large ensembles of identical quantum particles, taking into account the restrictions imposed by quantum mechanics, such as the Pauli exclusion principle and the wave-like nature of matter.
Expanding universe:-
- It is one of the most important discoveries in modern physics.
- It was first proposed by Edwin Hubble in the 1920s, and it has since been confirmed by many other observations.
Theory of Superconductivity:-
- It is a microscopic theory that explains the phenomenon of superconductivity.
- Superconductivity is the ability of certain materials to conduct electricity without resistance and to expel magnetic fields below a certain critical temperature.