1. A project on wave nature of light By: Manisha Xii – science Faith Academy 2008-09

3. The Wave Nature of Light Wavelength & Frequency c = λ ν

7. Huygen’s Picture of a Plane wave

8. Huygen’s Explanation of Reflection

9. Huygen’s Explanation of Refraction

10. Young’s double slit experiment: classic wave effect

11. Young’s double slit experiment Interference of light is the phenomenon of redistribution of light energy in a medium on account of superposition of light waves from two coherent sources

12. Formation of crests n troughs

13. Double slit experiment with particles (e.g. electrons) Interference pattern with one slit blocked

14. Double slit experiment with particles (e.g. electrons) Interference pattern observed on the screen When both the slits are open

20. The pattern spreads out due to Diffraction . Wave picture Light spreads out when passed through small aperture.

21. Position of minima: a sin θ n = nλ Position of maxima a sin θ n= (2n+1)λ/2

22. Polarization If unpolarized light is incident on 1 polarizer, the intensity of the light passing through is I= ½ I 0 .

23. • Light scattered at 90 degrees is 100% polarized . Polarization & Scattering

25. A polarizer will transmit linear polarized waves in the same direction independent of the incoming wave.

27. light :a wave leading to our future The end