Question

Please answer 6 A and B

6. a Find the minimvans thickness of a thin film of water that will produce a dark image for blue light with a wavelength&- 400 am b) Am un-polarized light with intensity of 200 W/im2 is polarized by passing it through a filte. If the polarized light is also made to pass through a second filter that makes an angle of 30 with the filter, find its final intensity 7. The lifetime a particlie at rest is 1.24 x 10*s Find the lifetime of this particle when travelling with a speed of 0.92e b) How fast must a meter stick travel to measure 0.25 m 8 What is the momentum of an electron travelling with a velocity v-0.98c? b) A particle has a rest energy of 105.7 MeV. Determine its velocity to have total energy of 139.6 MeV 9 What is the energ in eV of a violet light with a wavelength .-420 b) Determine the maximum kinetic energy of the photoelectrons emined by this violet light with à -420 nm if the binding energy or work finction for the metal is eiven by 2.71 ev

Answer 1