Is light visible if visible than how?

yes it is because it is visual so you can see it clearly.

Ultraviolet and higher frequency wavelengths are shorter than visible light.

We know that ultraviolet light, X-rays and gamma rays have wavelengths shorter than visible light.

Infrared light, microwaves and radio waves have wavelengths longer than visible light. Radio waves have the longest wavelength.

Because it's comprised of the band of wavelengths that the human eye can detect, that is, wavelengths that are 'visible' to human beings.