Question

4. (3 points) A photon has wavelength 450.0 nm. a) What is the momentum of the photon? b) Find the speed of a proton with the same momentum (from part a) Find the speed of a golf ball with the same momentum (from part a), if the mass of the golf ball is 45.9 g. c) What is the wavelength of a golf ball moving with speed 15 m/s? d)

Answer 1

6 given d= 450 nm d = 450 X10 m We know that according to de-booglly. - p= h T Where pa momentum - t = plank constant th=616810-343-5h p h d 6.68 10-34 usox 10 9 x 20 - 27 kg momentum TP = 1.478 10 27 kg-m. of photon Anc we know that mass proton mp - 1.67810 RgF p=mp ve - 1, 47810-27 = 1.67X10 27 v speed of the (vp = 0.88 m/s proton Ans

© If mass of golf ball is m - 45.gg mg = 45.9x10 3 kg. P = mg Vo 1.47X10-27 - 45.94103 va - V - 3.2x10-26 Speed of the ( 4 = 3.2x10-26 m/s golf ball It Vg = 15mis mg = 45.9 X 10 3 kg p= 15x us.gy 103 (P = 0.6885 kg-m/ According de- brogley. d = h = 6.6810-34 0.6885 Wave length of a (g = 9.586410-34 m galt ball. . Ans