1. Light is part of the Electromagnetic Spectrum. The waves of Light are composed of variations in a. Only Electric fields b. Only Magnetic fields c. Electric Currents d. Both Electric and Magnetic fields 2. What are the frequencies that correspond to the extreme wavelengths of visible light that are 400 (nm) and 700 (nm)? a. 7.5 to 4.3 X 1014(Hz) b. 1.3 to 2.3 X 1015 (Hz) c. 5 to 8 X 1016(Hz) d. Cannot Say 3. Table salt when heated emits yellow light of wavelength 5.89 X 10- (cm). The light passes through two slits that are 0.1 (mm) apart and 1 (m) away from a screen. What is the distance between the first order bright fringes on either side of the central maxima? a. 0.59 (cm) b. 1.18 (cm) c. 1.2 (mm) 1.18 (inches) 4. A diffraction grating has 10,000 lines per centimeter. At what angle from the horizontal (drawn to the central maxima) is the location of the first order maxima (bright line) if the wavelength of light is 589 (nm)? a. 200 b. 360 C. 450 d. Cannot be determined 5. Light of unknown wavelength falls on two slits separated by 0.188 (mm). A fringe pattern is seen on a screen 1.22 (m) from the slits. If the distance between the central maxima and the third order bright fringe is 1.23 (cm), what is the wavelength of light? a. 300 (nm) b. 411 (nm) c. 600 (nm) d. 822 (nm) 6. A narrow slit of width 0.15 (mm) produces a diffraction pattern with light of wavelength 600 (nm). If the first order minima is 0.5 (cm) away from the central maxima on the screen, what is the distance from the slit to the screen? a. 1 (m) b. 1.25 (m) c. 150 (cm) d. 200 (cm)