Question 1 of 2

A parallel beam of moving electrons is incident normal on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the slit is further narrowed, then which of the following statement is correct

1.  The diffraction pattern is not observed on the screen in case of electrons

2.  The angular width of the central maximum of the diffraction pattern will increase

3.  The angular width of central maximum will decrease

4.  angular with of central maximum will remain same