LIGHT waves lowest energy level at red colour and highest at violet.which frequency does black belong to?

That would be 0.



Black is the absence of light. That's like asking what frequency of sound is silence.

LIGHT waves lowest energy level at red colour and highest at violet.which frequency does black belong to?
Truly black color (which is totally absorbing) doesn't exist (We are not talking of black holes here). Black simply means the absence of any color or light. Hence the question of its frequency doesn't arise.
Reply:Juni,

My I disagree with your disagreement? We are talking light and frequency not the primary colors as in pigments. Yes when you mix markers or paint they will turn black, but that is because you no longer are reflecting the individual frequencies (specific light colors), they are now being absorbed by the paint. White light is made up of the entire light spectrum, and black is the absence of it. Does this clear up the confusion? Only trying to help, not be a smart ***.
Reply:The lowest end of the spectrum. the first harmonic is the beginning of the red phase
Reply:Black means the absence of light reflection, and it's an ideal situation. White appears when light of all wavelengths is reflected... In my opinion, the black you see is the result of an extremely low reflectance of all wavelengths of light...
Reply:yep,...'black' is actually not a colour,...we percieve black when there is NO ray entering our eyes....so,the frequency of black would be 0...

u can take some extra knowlege:

take white:its a combination of colours and has different light rays at different frequency reaching it,still their speeds remain the same coz speed= frequency*wavelength...and they adjust accordingly to bring the product same...



so,now i think everything is clear?
Reply:Black has no frequency. We can not see the black object.

Hence it is black.
Reply:I do not know the answer to this question but I beg to differ DJ. Black is a mixture of all the seven colors. Darkness may not have any frequency but I do not think think that this applies to balck light too.



I hope this helps. :)
Reply:Black is the absence of light, and is more related to the intensity (flux) of light than the colour. You could decrease the intensity of any wavelength of light down to nothing and you would have black, because black is nothing more than the absence of light.



Photonics is exciting. It will be the driving technology of the 21st century!
Reply:There is a difference between the perceived color black and "black light"



As was mentioned the perceived color black is no light at all.



A "black light" is a device that produces ultra violet light.