If white ligh goes into a material and only blue light comes out the other wavelengths have been

The other wavelengths got filtered out

Caught in the material. white light is the combination of all color wavelengths.
when it comes out blue, all other color wavelengths have been caught in the material except blue which is the wavelength, 450-495 nm.

Hope this helps.

The answer would be true

Birth orgraduate orschool