General Physics - The Wave Nature of Light

DIFFRACTION GRATINGS 'l . At what angle will 510-nm light produce a second-order maximum when falling on a grating whose slits are 1.35x10A-3 cm apart? 0 5.3 degrees 0 7.3 degrees 0 6.3 degrees 0 4.3 degrees 2 _ A grating that has 3800 slits per cm produces a third orderfringe at a 220 angle. What wavelength of light is being used? POLARIZATION 3- Two polarizers are oriented at 72 to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted? O 6.8 percent 0 5.8 percent 0 4.8 percent 0 7.8 percent 4. What is Brewster's angle for an airglass (n=1.56) surface? 0 60 degrees 0 58.3 degrees 0 59.3 degrees 0 57.3 degrees DOUBLE SLIT INTERFERENCE 1. Monochromatic light falling on two slits 0.018 mm a part produces the fifth-order bright fringe at an 8.6 angle. What is the wavelength of the light used? 4x101-7m 5.4x101-7m 4.4x101-7m 5x101- 7m 2. The third-order bright fringe of 610-nm light is observedat an angle of 31 when the light falls on two narrow slits. How far apart are the slits? 6x101-6m 3x101-6m 3.6x101-6 m 6.6x101-6 mVISIBLE SPECTRUM DISPERSION 3 By what percent is the speed of blue light (450 nm) lessthan the speed of red light (680 nm), in silicate flint glass? 1.7T Silicate flint glass 3 1.6 Borate flint glass Quartz Refractive index Silicate crown glass $1.5 Fused quartz 1.4- 400 500 600 700 Wavelength (nm) Violet Blue Green Yellow Orange Red - 1.3% 1.2% 1.3% - 1.2% 4. A light beam strikes a piece of glass at a 65.00 incident angle. The beam contains two wavelengths, 450.0 nm and 700.0 nm, for which the index of refraction of the glass is1.4831 and 1.4754, respectively. What is the angle betweenthe two refracted beams? O 0.23 O 2.23 1.23 3.23SINGLE SLIT DIFFRACTION 5_ If 680nm light falls on a slit 0.0425 mm wide, what isthe angular width of the central diffraction peak? 0 1.8 degrees 0 3.8 degrees 0 2.8 degrees 0 4.8 degrees 6_ Monochromatic light falls on a slit that iswide. If the angle between the first dark fringes on eitherside of the central maximum is 28.0 (dark fringe to darkfringe), what is the wavelength of the light used