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PIMSO 2025 - Science - Secondary 2 - National Round Question 16

PIMSO Science · PIMSO 2025 - Science - Secondary 2 - National Round

Question 16

According to quantum mechanics, particles like electrons are also waves. This has been shown by the double slit experiment (diagram shown below). In this experiment, a source of electron is placed a certain distance from two slits, which is itself placed in front of a detector plate. If the electron were to behave as a particle, there would be only two points where the electron would be detected, corresponding to the two slits of entry. To the researcher’s surprise, a pattern shown on the detector, characteristic of interacting waves, was detected. What behavior of of waves is the electron showing?
Question illustration
  1. Interference
  2. Diffraction
  3. Refraction
  4. Reflection