Protons and electrons can be given very high energies in particle accelerators. What is the wavelength in meters of an electron (mass = 9.11 * 10-31 kg) that has been accelerated to 5% of the speed of light? In what region of the electromagnetic spectrum is this wavelength?

Key Concepts

De Broglie Wavelength

The De Broglie wavelength is a concept that describes the wave-like behavior of particles, such as electrons. It is given by the formula λ = h/p, where λ is the wavelength, h is Planck's constant, and p is the momentum of the particle. For an electron, its momentum can be calculated using its mass and velocity, allowing us to determine its wavelength when it is accelerated.

Relativistic Effects

When particles like electrons are accelerated to significant fractions of the speed of light, relativistic effects become important. These effects, described by Einstein's theory of relativity, indicate that the mass of the particle effectively increases with speed, affecting its momentum and energy. For speeds approaching the speed of light, the classical equations of motion must be modified to account for these relativistic changes.

Electromagnetic Spectrum

The electromagnetic spectrum encompasses all types of electromagnetic radiation, ranging from radio waves to gamma rays. Each type of radiation is characterized by its wavelength and frequency. Understanding where a calculated wavelength falls within this spectrum helps identify its properties and potential applications, such as whether it is in the visible light range or in the X-ray region.