Content of the notes –

• Wavefront
• Different types of wavefronts
• Huygen’s principle
• Limitations of huygen’s principle
• Laws of reflection on the basis of Huygen’s wave theory
• Laws of refraction on the basis of Huygen’s wave theory
• Effect on wavelength, frequency and speed during refraction
• Interference of light
• Expression for intensity at any point in interference pattern
• Condition for constructive interference and destructive interference
• Relation between intensity, amplitude and width of the slit
• Young’s double slit experiment
• Solved questions on Young’s double slit experiment
• Diffraction of light
• Diffraction due to a single slit
• Solved questions