The X-ray cannot be diffracted by means of an ordinary grating due to

The X-rays cannot be diffracted by means of an ordinary grating because of______

Assertion : X - rays cannot be diffracted by means of grating . Reason : X - rays does not obey Bragg's law.

what is diffraction due to ?

A diffraction grating is ruled with 600 lines per millimetre. When monochromatic light falls normally on the grating, the first order diffracted beams are observed on the far side of the grating each making an angle of 15^@ with the normal to the grating. What is the frequency of the light?

Why coloid cannot be filtered by ordinary filter paper ?

Why colloids cannot be filtered by ordinary filter paper?