Coherent light passes through four identical slits to produce a diffraction patt
ID: 1622385 • Letter: C
Question
Coherent light passes through four identical slits to produce a diffraction pattern on a distant screen. At a point P on the screen, the phase difference between light from the first and the last slits is 2 pi. Which of the phasor diagrams below best describes this situation? What effect does the size of the box have on the ground state energy of a particle trapped in that box? a) Not enough information is given to answer this question. b) If the box is larger, the energy is greater. c) The size of the box has no influence on the energy. d) If the box is smaller, the energy is greater. e) If the box is smaller, the energy is smaller. In the non-relativistic case, doubling the speed of an electron causes its wavelength to a) quadruple, b) halve. c) triple. d) decrease by a factor of four. e) double.Explanation / Answer
12. d the triangle and back to same direction makes sense
13. c no effect at all E= h(2)k(2)/2m
14. b lambda = h/mv