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No, the word 'naked' is an adjective, a word that describes a noun: the naked truth; a naked toddler; a naked light bulb, etc.
It is not visible by the naked eye.
Light
The answer is visible light. Visible light is light that can be seen with a naked eye
UV light vibrates at a rate so fast that the naked eye cannot see it. Light energy's vibration is invisible to the naked eye, whether UV or not.