Invisible
The definition of 'invisible' is "Anything in which the naked human eye cannot see is invisible." Well, that's the definition in most dictionaries. But anything that cannot be seen by your naked eye is either too small or does not have enough or any light reflecting off of it well enough to allow you to see it.
No. Use "you saw something" or "you have seen something," depending on context
The noun measles is a concrete noun; although it can't be seen by the naked eye, the virus can be detected and seen with the use of instruments; measles is a physical thing.
Camouflage means to hide or disguise something so that it cannot be easily seen or found. Animals use camouflage to hide from predators and the military uses it to hide from the enemy.
Authorization is a noun.
"Invisible to the naked eye" means that something cannot be seen without the use of tools or equipment such as a microscope or telescope. It refers to objects or phenomena that are too small, too distant, or too faint to be seen with just the human eye.
Bacteria cannot be seen with naked eye.They are microscopic organisms.
No, quasars are extremely distant and bright objects that cannot be seen with the naked eye from Earth. They typically require powerful telescopes to be observed.
"Microscopic" refers to something that is so small it can only be seen with the aid of a microscope. It is typically used to describe organisms, structures, or particles that are too tiny to be seen with the naked eye.
That refers to a comet that cannot be seen with the naked eye; only with a telescope.
It is used to see things that cannot be seen with the naked eye
You cannot see a Blackhole with the naked eye and they're hard to detect anyway. No one would see a Blackhole pull anything into its center.
No, Euglena are microscopic organisms and cannot be seen with the naked eye. They are typically about 0.05 to 0.5 millimeters in size.
Atom
Microscopes help to see small objects that cannot be seen by the naked eye.
The answer is noise. Noise is a sound that is made by many sources, but it is intangible and cannot be seen with the naked eye.
No, an unfertilized egg cannot be seen in the toilet when a person urinates. The human egg is microscopic and cannot be seen with the naked eye.