A green light wave with some frequency f generated by a laser is traveling in a room through the air (n = 1). The wave then enters a piece of glass with n = 1.56. Consider the wave properties frequency, wave speed, and wavelength. For each of the three, determine if it is i. Larger in the glass than in the air Smaller in the glass than in the air ii. iii. The same in both the glass and the air Not enough information to tell iv. For each of the three properties, you must choose one of the four answers, and justify your answer for each with a brief sentence or two.

16. An electromagnetic wave is traveling from water to air and hits the interface at an angle θ1 as measured from the normal (dotted line) as shown in the figure below. Which pathway labeled 1 – 4 shows the correct pattern for refraction of the electromagnetic wave? Assume that θ1 is notequal to or greater than the critical angle for total internal reflection. A. path 1B. path 2C. path 3D. path 4

Which of following statement regarding holography is incorrect? A. Unlike a photography, the holography records both amplitude and phase information of the imaged objects. B. An optical hologram is produced through two beam interference, while image is reconstructed through light diffraction. C. Since several types of holograms can be reconstructed using regular white light, these holograms can produce and show true color images. D. When reconstruction beam only illuminates a small section of a hologram, one can still see whole image of the recorded object with lower resolution.

13. 14. Consider the following properties of light: rectilinear propagation reflection refraction diffraction I. II. III. IV. V. partial reflection-refraction Which of these properties did Huygens have trouble explaining with his theory of light? I only IV only I and IV only I and V only a. b. C. d. Monochromatic light coming from the left passes through a slit S and then falls on a metal sheet with two slits B and C as shown below. The slits are the same width. The light then falls on a screen. S | 5.0 m C .0 mm (a) 1.5 x 10-5 cm (e) 15 x 10-5 cm -10.0 m- The intensity pattern shown below is centred at P. 0 3 Distance (cm) The wavelength of the light is closest to (b) 4.5 x 10-5 cm P (c) 5.0 x 105 cm (d) 7.5 x 10-5 cm

A laser shines through a pinhole, and it makes a diffraction pattern on a screen behind. The area of the circular hole is reduced by a factor of 2. What can you say about the new intensity?A. It is less than 1/2 the original intensity.B. It is 1/2 the original intensity.C. Is is the same as the original intensity.D. It is greater than the original intensity.

If rada waves have a wavelength of 2.68 cm and a type of polymer (n=1.76) is used to make an airplane invisible to radar, how thick would you make the polymer coating? A. 0.43cm B. 0.76 cm C. 0.38 cm D. 1.33 cm E. 0.86 cm

Answer all. It is easy to answer all. Thanks

Unpolarized light of intensity 150 W/m2 passes through two ideal polarizing filters. The polarizing axes of the filters are indicated by the dashed lines. What is the intensity of light at point B? A. 8.77 W/m2 B. 14.4 W/m2 C. 37.5 W/m2 D. 66.2 W/m2 E. 109 W/m2

Physics 20: SUMMER Assignment 13 7. Use the following information and diagram to answer parts a and b. A reflecting surface is inclined 30° above the horizontal. A wave is traveling horizontally and reflects off the surface, as shown below. The solid grey line is the barrier and the black arrow is the wave. (1) (1) a) What is the angle of incidence? 30° 1 b) What is the angle between the incident ray and the reflected ray? 4

A light ray in air has an incident angle of 53.8ﾟ when it strikes the boundary of an unknown material. If the reflected ray is completely polarized so that the incident angle is the Brewster's angle what is the index of refraction of the unknown material? A. 1.25 B. .807 C. 1.69 D. .591 E. 1.37