The question is unclear. Here is the clear question:
Which color of visible light has the longest wavelength?
Answer:
Red
Explanation:
The visible light also known as white light comprises of different colors. The colors are;
1- Red
2- Orange
3- Yellow
4- Green
5- Cyan
5- Blue
6- Violet
Each color has a frequency and wavelength associated with it.
Note that the minimum the frequency the higher the wavelength.
Below are the ranges of wavelength of these colors in nanometer (nm)
Red 625–740 nm
Orange 590–625 nm
Yellow 565–590 nm
Green 500–565 nm
Cyan 485–500 nm
Blue 450–485 nm
Violet 380–450 nm
According to this Red has the highest wavelength and smallest frequency.
