2. What is a Diffraction Grating?
• • A device with many closely spaced parallel
lines (slits or grooves).
• • It diffracts light into multiple directions,
creating patterns.
• • Acts based on the interference of light
waves.
3. Types of Diffraction Gratings
• 1. Transmission Grating:
• - Light passes through the slits.
• 2. Reflection Grating:
• - Light reflects off the surface with grooves.
4. Basic Principle
• • Interference of light waves from multiple
slits creates patterns.
• • Patterns depend on wavelength and slit
spacing.
• • Demonstrates the wave nature of light.
5. Applications of Diffraction Gratings
• • Used in spectroscopy to analyze light.
• • Helps in measuring wavelengths of light.
• • Found in optical devices like
monochromators and spectrometers.