this assignment will be counted. Take this assignment at least once before Monday April 17th. You may take it as many times as you like after that for additional practice. This assignment will close after Exam 02. 1 1 point If the refractive index of a material is 2, this means that light travels O 2 times as fast in the material as it does in air O 2 times as fast in the material as it does in vacuum O 2 times as fast in air as it does in vacuum 2 O 2 times as fast vacuum as it does in the material 3 Clear my selection 4 5 2 1 point Light waves can be described as oscillating E-fields and B-fields perpendicular to the direction of motion of the light wave. This wave can 6 be characterized by its frequency and amplitude. What do these two physical quantities correspond to how we humans experience light? 7 C Frequency: color, amplitude: brightness O Frequency: loudness, amplitude: pitch (how high or low the note is) 8 O Frequency: brightness , amplitude: color 9 O Frequency: pitch (how high or low the note is), amplitude: loudness 10 Clear my selection2 points 5 * [3 You point a laser beam perpendicularly to the surface of water in a glass aquarium that is tilted at 30. Where will you observe the laser beam hitting the table? Ignore any effects of the glass on the IE] beam path. (Point P lies directly under the laser, on the extension ofthe incident beam in air.) Laser 7 Water 9 30 10 I P To the right of point P At point P The laser beam will not hit the table because it will undergo total internal reection To the left of point P Clear my selection a 2 points A ray of light is incident on a curved mirror in the shape of a circle as shown below. Which direction does the ray travel after hitting the mirror? The dot shows the center of the circular _L_.__ Ll...' .___l.__ ..._ .Ll__ .__..'.__.- -1 5 1 point A light ray is incident from a medium of refractive index n, to a medium of refractive index n2, in which n1 > n2. Which of the subsequent paths shown below can the light follow? n1 1 n2 2 D 3 A C 4 5 6 O D 7 O B O C 8 O D 9 Clear my selection 10 6 2 points The figure below shows possible paths that a ray of light can take going from air, to glass, to diamond and back out to air. The normals at9| n 2 points The gure below shows possible paths that a ray of light can take going from air, to glass, to diamond and back out to air. The normals at the location of each boundary where a ray hits is shown with dotted lines Airn =10 Which is a possible path the ray can take? 0 A Q B O c O D Q E Clear my selection 0003} Clear my selection 2 points A light ray travels through air and then passes through a rectangular glass block. It exits bent away from the normal. parallel to the original direction. bent toward the normal line. along the identical path that it entered the block. Clear my selection 2 points The gure below shows an approximate gure of a ray of light entering a piece of glass, then a piece of diamond and then nally exiting back out into air. Angle 91 is given. What are angles 92, 63 and 04? Hint: You can use a calculator for this but you do not need to \\ O Frequency: pitch (how high or low the note is), amplitude: loudness Clear my selection 3 1 point You shine a laser that goes from air into a chunk of glass. Which electromagnetic wave quantity or quantities are different in the air vs in the glass? 1 O Frequency of the wave O Wavelength of the wave 2 Wave speed 3 4 4 1 point We can observe total internal reflection when light travels 5 O from glass to water. 6 O from air to glass. O from air to water to glass. 7 O from water to glass. 8 Clear my selection 9 10 5 1 point A light ray is incident from a medium of refractive index n, to a medium of refractive index n2, in which n1 > n2. Which of the subsequent paths shown below can the light follow?10 2 points The figure below shows an approximate figure of a ray of light entering a piece of glass, then a piece of diamond and then finally exiting back out into air. Angle 01 is given. What are angles 02, 03 and 04? Hint: You can use a calculator for this but you do not need to E 1 01=450; 2 Air 3 n =1.0 4 5 Glass 6 n=1.5 7 Diamond 9 n=2.4 10 O 02 = 11.30, 03 = 28.10, 04 = 450 O 02 = 28.10, 03 = 11.30, 04 = 28.10 O 02 = 28.10, 03 = 17.10, 04 = 28.10 O 02 = 28.10, 03 = 18.39, 04 = 490 O 02 = 28.10, 03 = 17.10, 04 = 4508 2 points A ray of light is incident on a curved mirror in the shape of a circle as shown below. Which direction does the ray travel after hitting the mirror? The dot shows the center of the circular shape that makes up the mirror. D 2 3 Incident ray 4 5 6 A 7 B 8 9 10 On W D Clear my selection