B.P.S.C. CDPO (Pre) 2022
The alphabet X in X-ray stands for _______ ray.
aExpress
bUnknown✓ Correct
cInfrared
dXenon
eNone of the above / More than one of the above
Explanation
In X-rays, the letter X means an unknown ray. X-rays are a type of electromagnetic radiation. (404) ## Page 3
general-science