High Energy Physics | MCQs

Explanation

Pair production occurs when a high-energy γ-ray photon is converted into an electron and a positron near a nucleus.

It is a quantum phenomenon that requires photon energy greater than 1.022 MeV.

Explanation

Explanation

Cosmic rays are high-energy particles, primarily protons and atomic nuclei, that travel through space at nearly the speed of light.

They originate from sources like supernovae and other cosmic events and can reach Earth from outside the solar system.

Explanation

• High-speed electrons, such as those emitted in beta decay or used in electron microscopy, have wavelengths in the range of 10^-15 meters to 10^-12 meters.
• This is due to their high energy and momentum, which corresponds to a short wavelength according to the de Broglie hypothesis.