Key Concepts to study for wave-particle nature of light in the JEE Advanced exam:

1. Dual Nature of Light:
- Light exhibits both wave-like and particle-like properties.
- It can be described in terms of both wave and particle characteristics.
- The wave nature is explained by phenomena such as interference, diffraction, and polarization.
- The particle nature is explained by phenomena such as photoelectric effect and Compton scattering.

2. Electromagnetic Waves:
- Light is an electromagnetic wave consisting of oscillating electric and magnetic fields.
- Properties of electromagnetic waves include wavelength, frequency, amplitude, and speed of propagation.
- The electromagnetic spectrum encompasses a wide range of wavelengths, from radio waves to gamma rays.

3. Wave-Particle Duality:
- The wave-particle duality principle states that particles (such as photons) can exhibit both wave and particle characteristics.
- The behavior of light can be explained using the wave-particle duality concept.
- The de Broglie wavelength relates the momentum and wavelength of a particle, including photons.

4. Photoelectric Effect:
- The photoelectric effect refers to the emission of electrons from a material when light of certain frequencies (or energies) is incident on it.
- The effect cannot be explained by classical wave theory but is well explained by the particle nature of light.
- The energy of a photon is given by E = hf, where h is Planck's constant and f is the frequency of light.

5. Compton Scattering:
- Compton scattering is the phenomenon where X-rays or gamma rays are scattered by electrons, resulting in a change in their wavelength.
- The change in wavelength can be explained by treating photons as particles and applying conservation of energy and momentum.

6. Wave-Particle Duality Experiments:
- Various experiments, such as the double-slit experiment and the Davisson-Germer experiment, provide evidence for the wave-particle duality of light.
- These experiments demonstrate the interference and diffraction patterns observed when light or electrons pass through a barrier with multiple slits.

7. Quantum Mechanics:
- Quantum mechanics is the branch of physics that describes the behavior of particles at the atomic and subatomic levels.
- Wave-particle duality is a fundamental concept in quantum mechanics.
- Understanding the basic principles of quantum mechanics, such as wave functions, probability amplitude, and superposition, is crucial for studying the wave-particle nature of light.

By thoroughly studying these key concepts, students will be well-prepared to tackle questions related to the wave-particle nature of light in the physics section of the JEE Advanced exam.