500 meter
No, the human cannot see ultraviolet rays with the naked eye.
Around 2500-5000 visible stars with the naked eye.
"microscopic" Naked = The average human eye, without the use of any artificial aids like, glasses, microscope, telescope etc.
100 um
Like the human eye which can see distant constellations a tekescope can see objects many light years away!
I'm not sure, but I know that it is the only cell in the human body that can be viewed with the naked eye.
the human heart can be seen with the naked eye if chest is open
The term "naked eye" means that there is nothing helping the eye to see. for example, if you are using glassess or a telescpoe, then you are not using the naked eye.
When extracted from many cells in a sample, using various solvents, the DNA can easily be collected and seen with the naked eye.
The viewing of the stars is called star gazing! It's called "naked eye observation".
the Oocyte is the largest human cell and can be seen by the naked eye. more information on the Oocyte: http://en.wikipedia.org/wiki/Oocyte
All 88 of them