Diffraction
JEE:
| Concept | Mnemonic |
|---|---|
| Huygens’ Principle | Every point on a wavefront is a source of secondary waves. |
| Fresnel’s Half Period Zones | Imagine the wavefront divided into zones of equal area, with alternating signs. |
| Zone Plate | A zone plate is a transparent disk with a series of alternating opaque and transparent zones. |
| Diffraction Grating | A diffraction grating is a series of parallel slits or grooves. |
| Double Slit Experiment | Two slits produce an interference pattern on a screen. |
| Diffraction of Light by a Single Slit | A single slit produces a diffraction pattern on a screen. |
| Diffraction by a Circular Aperture | A circular aperture produces a diffraction pattern with a central bright spot. |
| Rayleigh Scattering | The scattering of light by particles that are much smaller than the wavelength of light. |
CBSE:
| Concept | Mnemonic |
|---|---|
| Huygens’ Principle | Every point on a wavefront is a source of secondary waves. |
| Fresnel’s Half Period Zones | Imagine the wavefront divided into zones of equal area, with alternating signs. |
| Zone Plate | A zone plate is a transparent disk with a series of alternating opaque and transparent zones. |
| Diffraction Grating | A diffraction grating is a series of parallel slits or grooves. |
| Double Slit Experiment | Two slits produce an interference pattern on a screen. |
| Diffraction of Light by a Single Slit | A single slit produces a diffraction pattern on a screen. |
