An Electron and a Positron,which Are Two Massive Particles,can Annihilate

question 33

Short Answer

An electron and a positron,which are two massive particles,can annihilate when they come together to produce two photons,which have no mass.According to special relativity,this pair annihilation is an example of __________.

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Definitions:

Multicellularity

The condition of an organism being composed of more than one cell, which allows for the differentiation of cells into specialized types and forms.

Billion Years

A unit of time equal to 1,000 million years, often used in geology, astronomy, and describing the age and evolution of the Earth and universe.

Millipede

A class of invertebrates characterized by having two pairs of jointed legs on most body segments, known for their slow movement and detritivorous diet.

Tetrapod

Vertebrate animals having four limbs or limb-like appendages, including amphibians, reptiles, birds, and mammals, as well as their extinct ancestors.