For the situation shown in Fig. 34.3, is the image distance s positive or negative? Is the image real or virtual? Explain your answers
1 Friday, November 13, 15 Diffraction and interference 2 Constructive Interference (1) § The geometric optics of the previous chapter cannot be used to explain interference § To understand these interference + phenomena we must take into account the wave nature of light § Interference takes place when light waves of the same wavelength are = superimposed § If the light waves are in phase, they interfere constructively, as shown to the right 14 Constructive Interference (2) § The statement that the two waves interfere constructively is the same as saying that