the most popular example of something that's invisible is air. right? but air is not invisable. if air was truely invisible, sunsets and sunrises would have no color. you would be able to see stars during the day. the reason we can't is because light is reflecting off particles in the atmosphere making the sky appear blue instead of black. it makes the sunset colorful. so therefore, air cannot be invisible.
what is invisible? you can't see it? well if you were in a room with no windows, and you shut off the lights, and unplugged the clock and everything that gives off light and were sitting in pure darkness, are the walls invisible? you can't see them so they must be. but we know that a wall of a room can't be invisible. so does invisible mean you can't see it even if there's light shining on it? well this isn't the case with our sky, because when light shines on it, you can see it. you see blue. or reds in a sunset. so air is not invisible. you just can't see air in small scale
2007-01-22 22:53:20 · 7 answers · asked by smokesha 3 in Science & Mathematics ➔ Other - Science
We see objects by detecting the light that's reflected off them (or that they emit). If the light from an object is not permitted to reach our eyes, then it's invisible.
Let's say that an object has some sort of sci-fi device that makes all light bend around it. No light hits it, therefore no light is reflected off it, therefore we can't see it.
You're right that we don't think of the ordinary situation of being in complete darkness as "invisibility". This is because if we suddenly turned on the light, we would see the object. Lacking light isn't invisibility, it's having light that doesn't reflect off an object. Likewise, an item inside a box isn't invisible: if we opened the box, we'd see it.
I believe that a perfectly visibly black body, that absorbed all visible radiation and reflected none, would be technically invisible. We'd only "see" it by being able to contrast it against other things that we could see.
2007-01-22 23:04:55 · answer #1 · answered by TimmyD 3 · 0⤊ 0⤋
Invisibility in scientific term means - that color that does not fall in the range of Violet - Red. Human eye can only recognize the colors between Violet and Red. Anything that is out of that range is not visible to us.
In your example, if there is no light falling on the walls, then there is no color emanating. So, it's invisible.
2007-01-22 23:03:59 · answer #2 · answered by jaggie_c 4 · 0⤊ 0⤋
invisible means the light/picture coming from the invisible object to the eye of the observer is exactly the same as the light/picture in the background of the observed object, either by letting the light/picture pass trough the object unhindered, or by replicating the exact light/picture and transferring it through the invisible object.
2007-01-22 23:13:46 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Invisible means that you can't see it when you should be able to, such as you have a light source that is sufficient to see everything in the room.
2007-01-22 22:57:09 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Invisible: Unable to be seen or detected by the naked eye. Does not indicate whether or not said item exists; only that it is not visible.
2016-05-24 00:21:35 · answer #5 · answered by Anonymous · 0⤊ 0⤋
invisible means "not visible to the eye"
invisibility is the characteristic of air, air is there but is not having any colour of its own that's why its not visible
and about your sun rise & sun set example then i'd like to tell u again that air is having no colour and sun is orangish-reddish yellow so that colour dissolves in air and we r able to see the amazing views
similarly in a sandstrom in desert, air changes into muddish yellow colour b'coz sand of that area is mixed with air
2007-01-22 23:14:06 · answer #6 · answered by Anonymous · 0⤊ 0⤋
invisible is something the naked eye can't see.
2007-01-22 22:57:21 · answer #7 · answered by syncrofish 1 · 0⤊ 0⤋