In the "visible" light it is violet.
Your question is meaningless. Light is electromagnetic radiation and the colour of light depends on the wavelength of this radiation. There is no such thing as a "weak" wavelength.
The longest visible wavelength of light appears red. "Longest wavelength" is equivalent to 'lowest frequency'.
Assuming you mean visible light, that would be red light.
Light from the red end of the spectrum penetrates deep water better than light from the blue end of the spectrum. Evidence: Algae that live in deeper water have chlorophylls with absorbance peaks in the infra-red part of the spectrum.
Violet has the shortest wavelength and highest frequency among visible light colors, whereas red has the longest wavelength and lowest frequency.
Your question is meaningless. Light is electromagnetic radiation and the colour of light depends on the wavelength of this radiation. There is no such thing as a "weak" wavelength.
Violet.
Red light has the longest wavelength.
It alters the energy and colour of the light.
That's blue light.
The longest visible wavelength of light appears red. "Longest wavelength" is equivalent to 'lowest frequency'.
Red
Assuming you mean visible light, that would be red light.
Light from the red end of the spectrum penetrates deep water better than light from the blue end of the spectrum. Evidence: Algae that live in deeper water have chlorophylls with absorbance peaks in the infra-red part of the spectrum.
Violet has the shortest wavelength and highest frequency among visible light colors, whereas red has the longest wavelength and lowest frequency.
...because the colour of an object depends on the wavelength of light it reflects, or the wavelength of light it emits.
The longest wavelength / lowest frequency visible light is the red end of the spectrum. The shortest wavelength / highest frequency visible light is the violet end of the spectrum.