29. Total internal reflection has important applications in fibre optic surgery. A long, 30. Monochromatic light with a wavelength of 5.52 x 10" m enters from air into a narrow optical fibre is used in microsurgery for lessening trauma and the chance of second medium that has a refractive index of 1.74. The wavelength and speed of infection, and for reducing the healing period. Light within an optical fibre light in the second medium, respectively, are undergoes total internal reflection hundreds of thousands of times without escaping. The critical angle at the glass-air interface (nglass = 1.55, nair = 1.00) is 3.17 x 10"/m and 2.00 x 10 m/s 33.7 5.43 x 10"/ m and 5.25 x 10 m/s 48.20 3.17 x 10"/ m and 1.72 x 108 m/s 40.2 5.43 x 107 m and 3.00 x 108 m/s 56.3 33. Ultraviolet light of wavelength 4.00 x 10-8 m irradiates a certain material, releasing photoelectrons with a maximum kinetic energy of 30.0 ev. The work function of the material is 31. A second-order nodal line is measured at an angle of 14.0 from the central maximum. A diffraction grating with 1.10 x 104 lines/cm is used to determine the 4.97 x 10-18 J wavelength of the light. The wavelength, expressed in scientific notation, a.bc x 10" m. The values for a, b, c, and d are . (Record your four 1.73 x 10-19 J digit answer) 9.77 x 10-18 J Your answer: 4.80 x 10-18 J Ek max frequency D 32. The expression for Planck's constant is C-0 D-B C-0 A - B B - A C-0 D-0 34. A metal has a work function of 1.55 ev. Light with a frequency of 8.25 x 1014 Hz is incident on the metal. The stopping potential, in Volts, is V. (Record your 3 digits answer) Your answer: 35. The maximum kinetic energy of photoelectrons does not depend on O frequency of the incident light photons. threshold frequency of the photosensitive surface. O energy of the incident light photons. intensity of the incident light photons