Question

the wavelike properties of electrons are useful in ______.
defining photons
determining the velocity and position of a particle
magnifying objects
writing electron configurations

Explanation:

Electron microscopes use the wave - like properties of electrons. Since the wavelength of electrons can be made much smaller than that of visible light, electron microscopes can achieve much higher magnification.

• Defining photons: Photons are particles of light, and electron wave - like properties have no direct relation to defining photons.
• Determining the velocity and position of a particle: According to the Heisenberg uncertainty principle, we cannot simultaneously determine the exact velocity and position of a particle with certainty, and electron wave - like properties are not used for this in the context of the given options.
• Writing electron configurations: Electron configurations are based on the quantum numbers and energy levels of electrons (particle - like behavior in terms of discrete energy levels), not directly on their wave - like properties for magnification.

Answer:

magnifying objects