Question

Part 1 Questions 1. Frequently, photographs of bright lights will show a 'star' effect on the film. This is a diffraction pattern produced by the opening, or iris, in the lens. How will this effect depend on the size of the opening? 2. Suppose we pass the laser light through a slit with an opening of 1000 nm. What kind of diffraction pattern would you expect to see? Would the pattern be broader than the ones you have seen? Explain.

Answer 1

Consider a r a interefered Some light light source vay with wavelength with a slit allowing to passt let width of slit - w Assuning 12 rays of light hitting the sto 7. 1 12 If By that the optical path length 7/2, the two rays is produce a dart of two rays differ interfere destructively Spott. So we ha w sino a wsino a

11 When wo is smaller than equation wsino - alwhas and no dark fringes are the hand no solution produced