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.
First, the sun emits the largest amount of light in the green part of the spectrum. There is less blue light than green and less violet light than blue. Second, our eyes have evolved to see the light emitted by the sun, so our eyes are most sensitive in the green part of the spectrum rather than to blue and violet.