Use the following information to answer the next question 18. A student selects a blue laser to shine on a photoelectric cell, but notices that the beam does not produce a photoelectric current. The student decides to select another laser to produce the photoelectric current. This time, she selects a laser One example of Compton scattering is shown below. The incident photon has a that emits momentum of 2.0 x 10-2 N.s. It collides with a free electron that is initially at rest. The scattered photon has a momentum of 1.72 x 10 2N.s, 85.0" from the direction a red beam. of the incident photon. an ultraviolet beam. Direction of a microwave beam. scattered photon an infrared beam Free electron 85.0 20. X-rays having a wavelength of 4.00 x 10:11 m strike a metal plate and eject electrons along with scattered X-rays having a wavelength of 7:00 x 10-11 m. Direction of 45.0 Determine the speed of the ejected electrons. incident photon Direction of scattered electron 6.83 x 1015 m/s 5.72 x 107 m/'s 26. The magnitude of the momentum of the free electron after it has been hit by the 3.27 x 1015 m/s incident photon is a.b x 10"cd. The values for a, b, c, and d are (Record your 4 digit answer) 6.84 x 107 m/s Your answer: 24. Light with a wavelength of 235 nm shines on a metal and a photoelectric current is detected. While the light is still shining, this current is reduced to zero with a stopping potential of 1.73 V. What is the work function of the metal? 19. When a certain metal is struck by a photon with a frequency of 6.78 x 1015 Hz, the metal emits an electron with a maximum speed of 9.14 x 105 m/s. 2.77 x 10-19 J The work function for this metal is ev. (Record your three digit answer.) 1.12 x 10-18 J Your answer: 0OO 8.46 x 10-19 J 5.70 x 10-19 J 17. A gamma-ray photon with 7.00 MeV of energy has a wavelength, expressed in scientific notation, of a.bc x 10" m. The values of a, b, c, and d are (Record your 4 digits answer) 25. A photon travelling at 4.57 x 105 m/'s has the same momentum as a photon with a Your answer: wavelength of 1.59 x 109 m 3.20 x 10 13 m 16. According to the quantum theory. as an object becomes hotter, the intensity of the electromagnetic radiation it 7.86 x 1011 m emits increases and its wavelength increases. 2.18 x 10-13 m blackbodies emit electromagnetic radiation as blackbody radiation, according to the blackbody curve. the largest amount of energy at a particular frequency or wavelength is known as a quantum. as an object becomes hotter, the intensity of the electromagnetic radiation it emits increases and its wavelength decreases