GRE Subject Test: Physics

The GRE Subject Test in Physics assesses knowledge and understanding of undergraduate-level physics concepts and principles.

Advanced Topics

Optics & Wave Phenomena

The Science of Light and Waves

Optics and wave phenomena explore how light and other waves travel, interact, and produce effects like rainbows and sound.

Key Ideas

  • Reflection and Refraction: How light changes direction at surfaces.
  • Interference and Diffraction: When waves overlap or bend around obstacles.
  • Polarization: The orientation of wave vibrations.

Modern Uses

From fiber optic cables to noise-cancelling headphones, understanding waves is vital for technology and communication.

A Handy Equation

The wave equation \( v = f\lambda \) links a wave's speed, frequency, and wavelength.

Key Formula

\[v = f\lambda\]

Examples

  • How glasses correct vision by bending light.

  • Why compact discs show rainbow colors.

In a Nutshell

Optics and wave phenomena describe how waves—including light and sound—move and interact.

Key Terms

Wavelength
The distance between two consecutive peaks of a wave.
Frequency
How many wave cycles pass a point per second.