If unseen thing made of normal thing, it can be observe with current technology? Can current technology observe oxygen physical appearance? how it look like? If cannot, how can u said oxygen exist? do they really saw O2?
Angels are supposed beings bringing messages from God to us.
And He taught Adam the names, all of them; then he presented them to
the angels, and said, “Tell Me the names of these, if you are
sincere.” They said, “Glory be to You! We have no knowledge except
what You have taught us. It is you who are the Knowledgeable, the
Wise.” He said, ...
Praise be to Allah.
I believe that angels can be more faster than the speed of light, because,
Allah created the angels from light. The Prophet (peace and blessings of Allah be upon him) said: “The angels were created from light, the jinn were created from smokeless fire, and Adam was created from that which has been described to you.” [Muslim, 2996]