Quantum Objects (electrons)
Electrons are emitted at the source and arrive at the detector only if they pass through the slits.
Key features:
- Electrons arrive “in lumps”, i. e. the energy deposited at the detector is not continuous, but discrete. The number of electrons arriving per second can be counted -- like particles!
- The number which arrive per second at a point (x) with both slits open (N12) is NOT the sum of the number which arrive per second when only the top slit is opened (N1) and the number which arrive per second when only the bottom slit is opened (N2). An interference pattern is seen -- like waves !