What is a key physical difference between the spectral curves in Blue star

1a) What is a key physical difference between the spectral curves in Blue star,yellow incandescent light bulb versus green chalk board and red stage filter light?
b) How do we show this difference in the spectral curves?
2) Consider the following 3 media: air (n=1.0003), water(n=1.333), glass(n=1.5). Consider also the critical angle values for the following medium-interfaces: water-air(critical angle:42 degree), glass air(c.a:49 degree) glass water (c.a:63 degree). Sketch three separate examples where total internal reflection of light can be happen, using only the three media listed above. make sure to properly label all your diagrams.