alpha ray

ریشه

From 'alpha' (first letter of the Greek alphabet, used in science to denote the first in a series) + 'ray' (from Latin 'radius' meaning 'beam of light').

مثال

• Alpha rays are emitted by certain radioactive substances.
• Alpha rays can be blocked by a sheet of paper or a few inches of air.
• The alpha ray is a stream of alpha particles.

ترکیب‌های رایج

Emit alpha rays Block alpha rays Alpha ray penetration