Few days back in a 10 grade school practical, we were shown the dispersion of light by a prism to create spectrum.
Then we went into the open sun and performed it under a linear building roof and same results were obtained.
But when a teacher took it in the light and the spectrum was displayed on the ground cement, a child's shoe can in the spectrum's way and the spectrum was still visible on his black shoe.
Now my question is if the objects that appear black absorb the colors and radiate them back.
So why does the spectrum appears on the shoe when the colors should be absorbed by the shoe material and no color but black must appear as it is the absence of any color radiated?
And also i want to ask that do blackbodies radiate back the same color the absorb?