Light exhibits wave properties through phenomena like diffraction and interference. When waves from two sources meet at a point, they can interfere constructively or destructively. This is demonstrated by patterns of light and dark lines. Huygens' principle states that light travels as wavelets. If two point sources of light are used, an interference pattern should be observed. To determine the wavelength of light, measurements are taken of the slit spacing, fringe separation, and distance between the slits and screen. These values are then used in the equation relating wavelength, slit spacing, fringe separation, and distance.

1. How does light show wave properties?? Light as a Wave – Diffraction and Interference

2. Waves interfere constructively and destructively when they meet at a point 2 sources with waves meeting show this where lines show both types of interference To review http://www.walter-fendt.de/ph11e/interference.htm

3. But how does this explain light behaviour..? According to Huygens's principle, light travels as ‘wavelets’ If we look at 2 point sources of light, we should see the same interference pattern…. Let’s see….!!

7. Measurements Value for L – Slit screen distance Value of X – Fringe separation Value of d – slit spacing Value of  – Unknown… Equation  / d = X/L