A dental implant is a titanium post (like a tooth root) that is surgically positioned into the jawbone beneath the gum line that allows your dentist to mount replacement teeth or a bridge into that area. An implant doesn't come loose like a denture can.
1 Redâ This is the first color of the rainbow from top. Red signifies passion, vitality, enthusiasm and security. It is the light with the longest wavelength.  Orangeâ This light or color is a combination of yellow and red.
See explanation. Color implies visible light, so to answer your question: red light has the longest wavelength #(~~620 - 740 nm)#. However, there also exists light with even longer wavelengths that are not visible to the human eye, from infrared light to radio waves (with wavelengths that are meters long!)