wavelength, amplitude
or maybe you meant sound and light (waves?)
The two main categories of seismic waves are body waves and surface waves. Body waves can travel through the earth's inner layers, but surface waves can only move along the surface of the Earth.
The two main categories of seismic waves are body waves and surface waves. Body waves can travel through the earth's inner layers, but surface waves can only move along the surface of the Earth.
The two main categories of seismic waves are body waves and surface waves. Body waves can travel through the earth's inner layers, but surface waves can only move along the surface of the Earth.
body and surface waves
The two categories of classification of waves are based on their medium of propagation: mechanical waves, which require a medium to travel through, and electromagnetic waves, which can travel through a vacuum.
You haven't stated any categories.
You tell me!
The two main categories are convenience goods and shopping goods; two lesser categories are specialty items and unsought goods.
Deoxyribose and Ribose
descriptive and inferential
botany and zoology.
IT is separated into two main categories (1) those which process information, such as computer systems, and (2) those which disseminate information, such as telecommunication systems.