They will look red.
This is because red boots only reflect red light. If white light was shining on them then they would still appear red because the red light would be reflected into your eyes and the other colours from the spectrum would be absorbed. However, if, for example blue light was shining on them, they would look dark/black because there is no red light to reflect.
It would appear to be red because it can only reflect the red light.
Under a red light, blue would appear dark or black because red light is absorbed by objects that are not red. Since blue is not a color in the red light spectrum, it cannot reflect or be seen under red light.
The red object would appear red under a red light because objects primarily reflect the color of light that is shining on them. Since red light contains mainly red wavelengths, the object would still reflect red light and appear red.
The object would be black, because red cannot reflect green light so no colour is reflected of the object.
The color you get when you mix red and blue light is magenta.
It looks red.
black and red predators
It would appear to be red because it can only reflect the red light.
Red is a primary colour for light.
Under a red light, blue would appear dark or black because red light is absorbed by objects that are not red. Since blue is not a color in the red light spectrum, it cannot reflect or be seen under red light.
The red object would appear red under a red light because objects primarily reflect the color of light that is shining on them. Since red light contains mainly red wavelengths, the object would still reflect red light and appear red.
The object would be black, because red cannot reflect green light so no colour is reflected of the object.
You get white light, the basic light colour you see every day.
Orange!
red
red
It looks purple in colour. So let's see: You are wearing a blue shirt and a dress of some other colour, have I got this right? If the shirt is truly pure blue and it is hit by pure red light it will appear black. I can't answer for the dress, because its colour is not stated.