Useful Stuff: IPIS1 - PISal = (n - !)a singh = L E = nhf h = 6.63x1034 Is Ex = hf - W c= f1 A= P5. [2 marks] You observe diffraction in a ripple tank as shown in the figure to the right, where a plane wave with a certain wavelength and frequency of (1 and f) passes through single slit of width "d". List two ways you could increase the diffraction of waves beyond the barrier. banner bamer wave generator 6. [5 marks] Two slits are 1.58 x 10* m apart. A mixture of red light (wavelength of 665 nm) and yellow-green light (wavelength 565 nm) falls onto the slits. A screen is located 2.2 m away. Find the distance between the third- red dark fringe and the third yellow-green fringe.E 7. [2 marks ] Starting from p= - (photon momentum), show that 1 = = (De Broglie wavelength). 8. [ 2 marks ] Calculate the momentum of a photon whose frequency is 6x1014 Hz 9. [ 2 marks ] Determine the energy of 1 quantum of infrared radiation ( 1 =941 nm ). 10. [3 marks] A bowling ball (mass 5 kg) rolls with a speed of 12 m/s. a) Determine the De Broglie wavelength of the bowling ball b) Explain why we do not notice wavelength behaviour for everyday objects (i.e. diffraction)