A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statements is correct ?

Question

( A ) The angular width of the central maximum of the diffraction pattern will increase
( B ) The angular width of the central maximum will be unaffected
( C ) Diffraction pattern is not observed on the screen in the case of electrons
( D ) The angular width of the central maximum will decrease