PHYS 1402 Module 3 Unit Test Question 1What is the intensity of an electromagnetic wave with a peak electric strength of 240. V/m? Answer in W/m^2Answer:76.5Question 2Components of some computers communicate with each other through optical fibers having an index of refraction n = 1.45. What time in nanoseconds is required for a signal to travel 0.180 m through such a fiber?Answer: .87Question 3A large reflecting telescope has an objective mirror with a 10.5 m radius of curvature. What angular magnification does it produce when a 2.95 m focal length eyepiece is used?Answer: -1.78Question 4Calculate the angle for the third-order maximum of 605 nm wavelength yellow light falling on double slits separated by 0.105 mm. Answer: 0.990Question 5The speed of light in the void between molecules in glass is Select one:a. less than its speed in a vacuum.b. the same as its speed in a vacuum. c. more than its speed in a vacuum.Question 6Which of the following cannot travel in a vacuum?Select one:a. A radio wave.b. A light wave.c. ...all can travel in a vacuum.d. ...none can travel in a vacuum.e. A sound wave. Question 7Diffuse reflection occurs when the size of surface irregularities is Select one:a. small compared to the wavelength of the light used.b. large compared to the wavelength of the light used.Question 8The critical angle for a transparent material is the angel at and beyond which all light within the material is: Select one:a. diffusedb. absorbedc. dispersedd. refractede. reflected Question 9Your image in a mirror isSelect one:a. real.b. neither of these.c. both of these.d. virtual. Question 10The image in a pinhole camera is Select one:a. always right-side up.b. always inverted. c. sometimes inverted.Question 11A hologram is simply a Select one:a. complex diffraction grating. b. pair of semi-crossed polarization filters.c. thin sheet of non-cubic transparent crystals.d. none of these.e. thin photographic film with microscopic images over the entire surface.Question 12Monochromatic light is light of a singleSelect one:a. frequencyb. wavelengthc. colord. all of these e. none of theseQuestion 13A film of soapy water (n = 1.33) on top of a sheet of polystyrene has a thickness of 168 nm. What wavelength is most strongly reflected if it is illuminated perpendicular to its surface. (This is the apparent color of soapy film.)Answer: