Visible white light is actually made up of a whole range of colours. It is the portion of the electromagnetic spectrum that is visible by the human eye. When is passes through a glass prism, the light is separated into 7 colours and this process is called dispersion. The colours are red, orange, yellow, green, blue, indigo and violet. The red colour, Infrared, has the longest wavelength, and the violet, UltraViolet, has the shortest wavelength. The sun is a natural source of visible light.
The uses of Light: Light allows us to see objects. Different objects absorb certain light and reflect away the other colours. Thus different objects have different colours. The colour of the objects is determined by what light is absorbed and what light is reflected back to our eyes.
Why does the different colours have different frequency? EXPLAINNN :D
ReplyDeleteHow does the sun damage the retina in the eyes.
ReplyDeleteIndigo is not part of the rainbow :D
ReplyDeleteSo when visible light passes through a glass prism,the frequency changes and thus the colour changes?
ReplyDeletehow does the wave affect the retina of the eye
ReplyDelete@K.Chua Indigo is part of the rainbow..
ReplyDeleteIs there any reason of why the colors have different wave lengths?
ReplyDelete