Noun. 1. invariant-a feature (quantity or property or function) that remains unchanged when a particular transformation is applied to it. characteristic, feature-a prominent attribute or aspect of something; the map showed roads and other features; generosity is one of his best characteristics.
The part of the sun that is going to emit the most visible light is going to be the Photosphere.he photosphere is the layer of the sun that emits visible light.  The light is emitted by hydrogen atoms and is bright red. Edit. Share to: Answered. In Astronomy.
the levels reaching the Earthâs surface. The sun emits energy over a broad spectrum of. wavelengths: visible light that you see, infrared radiation that you feel as heat, and ultraviolet. (UV) radiation that you canât see or feel. UV radiation has a shorter wavelength and higher. energy than visible light.