light is visible or not ?
143804
Only light within the visible spectrum (450 nanometres (nm) wavelength, to about 700nm wavelength). \n\nOther light (infra red and above / ultraviolet and below) is not visible.
143118
Yes.  Black is the condition of no visible light reaching the eyes.  However, because 'colour' is an arbitrary way that humans identify the sensation of electromagnetic waves, the fact that 'black' can be sensed makes it a colour.  However, black can either be the absence of all light or the combination of many other colours.
217437
Not in the same way that light reflects. This is an important topic in X-Ray telescopes. See below!
869398
lights off...but candles lit.  but be careful...we don't want a fire...might ruin the moment.  Candles lit...or just a dim light because it's more flattering than a bright light.  (i need all the help i can get after having an 8 pound baby!)  you wanna be able to see something...that's why I need SOME light.\n\nhope that helps.
870781
a light bult emits the same amout of light in a dark room as it does in a bright room.  Your eyes, when adjusted to dark, allow more light in and it seems brighter.
400598
All of the light "floating" in the air is composed of photons which are eventually absorbed by the atoms in the room and converted into heat.  This heat eventually dissapates through the walls and radiates outside the room.  Of course, there is an imperceptable delay between when the last photon leaves the light and is absorbed by the walls, but this happens at the speed of light and can't be seen by you or me.
1185494
Yes!  Dark is untill you are able to see and distinguish things in the room.  You could be half blind and see the room dark at normal lights but if more lights are brought in, you see the room perfect.
417045
Or did you mean when light hits an object, rather than lightning?\n\nIn this case, it really depends on the composition of the object and the wavelength of the light.  Generally, some of the light is absorbed into the object in the form of energy, and some of it is reflected back.  For example, a white light shone onto a red postbox will absorb every colour within the white light except for the red wavelengths which will reflect and be seen, hence it appearing red.
337135
It is because of the air bending the light slightly. Its the same as shining a light through water, but the effects are less pronounced.
138675
No it is not. \nVelocity of Light is constant.
953054
people call "dark" what they cannot "see"".To "see" means to detect by means of their eyes that part of electromagnetic waves which we call "visible light".But there is much more "energy" than that.
554379
light.\n\nlet me refer you to e=mc2...light has mass energy and inertia.\na light is a wave and a particle.\nIt is in motion, and objects in motion have inertia and thusly power.\n\nThe true absence of light would exist in a vacuum. There is no pwer in a true vacuum. Even if the absence of light was "massive", that word you chose is a relative term, which is to say that massive CAN NOT imply mass, inertia, etc. The absence of light is NOT measurable because there is nothing there to exist.
727800
Those are states of matter (but there's also plasma).  Light isn't matter, it's a wave, like sound.
12889
You are correct that the box is the color of the light it reflects.   Alternatively, you can say:  The box is the color not absorbed by the molecules on its surface.     But you would never say the box is the color absorbed by the molecules on its surface.   That is, your last statement is false.
749829
It looks white. Not a b.s. answer - optical means sight or vision.
594651
Its a high frequency low wavelength light.can you see UV? no right? so it appears black.. also its monochomatic that you dont see the tinge of other light or colour...
276568
You may be confusing light with pigment.  If there is no light, the light can't be colored.  However, the pigment of the grass which absorbs all but green light is the same, whether light is shining on it or not.