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Q1: In Fig. 33-41, a beam of unpolarized light, with intensity43 W/m , is sent into a system of two polarizing sheets with polarizing directions at angles 01 = 70° and 02 = 90° to they axis. What is the intensity of the light transmitted by the system? See Answer
Q2: 4. Describe the distinction between a real image and a virtual image. For each of the following, describe what kind(s) of image(s) can be formed (real or virtual, right-side-up or upside-down, larger or smaller than the object), how each is formed and, quantitatively,how does one find the location of the images. Also, draw an appropriate ray diagram (or diagrams) to show how to find the image for each, given the focal length and an object of a particular size and distance. If there is more than one case (such as both real and virtual images), make a diagram for each case: (a) Plane mirror (b) Concave spherical mirror (c) Convex spherical mirror (d) Positive lens (e) Negative lens.See Answer
Q3: 5. How does a camera work? How does a magnifying glass work? How does a telescopework?See Answer
Q4: 2. By considering the plot of Fresnel diffraction from an opaque edge, what is the transverse distance from the classic shadow edge to the line of peak irradiance? Estimate the value for A = 650 nm (red) and a distance of z = 1.0 m from the opaque screen.See Answer
Q5: 2. Explain what is meant by the index of refraction of a medium. What is meant by dispersion? What is Snell's law? What is meant by"geometrical optics?" Compare and contrast this to "wave optics."a light ray? What is meant bySee Answer
Q6: 3. Describe, qualitatively and quantitatively, reflection and refraction. What is meant by total internal reflection. Give an example.See Answer
Q7: Suppose the transmission axes of the left and right polarizing disks are perpendicular to each other. Also, let the center disk be rotated on the common axis with and angular speed w, this means 0 = wt. a) Show that if unpolarized light is incident on the left disk with an intensity of Imax, the intensity of the beam emerging from the right disk is: I=\frac{1}{16} I_{\max }(1-\operatorname{Cos}(4 \omega t)) You will find the following trigonometric identities helpful: \operatorname{Cos}^{2}(\theta)=\frac{1}{2}(1+\operatorname{Cos}(2 \theta)) \quad \operatorname{Sin}^{2}(\theta)=\frac{1}{2}(1-\operatorname{Cos}(2 \theta)) \quad \operatorname{Cos}^{2}\left(90^{\circ}-\theta\right)=\operatorname{Sin}^{2}(\theta) ) Sketch a plot of the emerging intensity as a function of time using w = 0.5 Fad, and Imax = 16m2. Compare the frequency the disk rotates and the frequency of oscillation of you intensity plot. Explain how/ why one is 4x the other.See Answer
Q8: 3. A sheet of acrylic can be a molded into a Fresnel lens to provide a reading aid. Consider an arrangement that provides a x2 magnification for the reader when placed 100 mm above the text (take d =550 nm corresponding to the middle of the visible spectrum). What is the diameter of the central Fresnel zone? How many Fresnel zones are there across the diagonal of an A4 (210 mm×297 mm) format magnifier? Hint: think about what focal length for the lens is required.See Answer
Q9: 4. The angular distance between the centre and the first minimum of a single-slit Fraunhofer diffraction pattern is called the half-angular breadth; find an expression for it. Find the value for a slit width of 0.1 mm and a wavelength A = 650 nm. What would be the corresponding distance on a viewing screen 2 m from the slit?See Answer
Q10: 5. Show that for a double slit Fraunhofer diffraction pattern, if d = mw, the number of bright fringes within the central diffraction maximum will be equal to 2m.See Answer
Q11: 1. What is the result of the superposition of two monochromatic, counter-propagating electromagnetic waves A cos(kz – wt) and A cos(kz + wt)?See Answer
Q12:1. An 1 m-tall vertical arrow is placed 8 m away from the converging lens with the focal length of 5 m.See Answer
Q13: 3. (Test advanced understanding of RSoft) Draw an asymmetric planar wave guide on RSoft such as the one showed in Figure 2. (10 marks) a) Run a thickness sweep (from 0.1 to 1 μm) for the propagating medium and plot the effective index as a function of the nitride thickness for the fundamental mode at 1550 nm. What are the effective indices in the limits (thickness-0 ) and (thickness - infinity) b) For a 1-um-thick silicon nitride layer, use monitors to determine the partial power on each layer for the fundamental mode. (2 marks) c) Repeat part b but for a silicon nitride layer thickness of 0.5 µm (2 marks). d) At what silicon nitride thickness do you start to see the first higher order mode? (1 mark) e) Repeat part b but for the first higher order mode and the thickness you just determined (2marks). See Answer
Q14:Question 2 Hypothesis: In an If /Then statement highlight the purpose of the experiment. For instance: If two same shape objects but with different masses are dropped from same height, then they will hit the ground at the same time.See Answer
Q15:Question 7 In a paragraph between 100 and 150 words explain. What did you Learn? What conclusion can you draw from the results of this lab assignment?See Answer
Q16:Question 8 In one sentence compare the results of the experiment with your HypothesisSee Answer
Q17:1. The wavelength of a monochromatic light changes from λo to λ = λo/n when it propagates from air into an optical medium such as glass. Does the frequency of the light change? Why?See Answer
Q18:2. Rainbows can form in mist, such as that of a waterfall as shown in the photo. Use dispersion and total internal reflection to explain how the rainbow is formed when sunlight emerges from water droplet.See Answer
Q19:4. In Measurement #3 how does the brightness of the reflected ray change when the incident angle changes from less than θ. to greater than θc? Why?See Answer
Q20:5. A fish tank is filled with water of 1.5 m deep. A fish is swimming around at the bottom of the tank. (a) If you are looking down into the tank from above, what is the apparent depth of the fish? (The index of refraction of water is 1.33). (b) Draw a diagram showing the real and apparent depth of the fish in water tank. (refer to Fig. 7). (c) Assume you try to catch the fish using a fishing net. Can you catch the fish if you quickly move the fishing net to the position where you see the fish in the tank from above?See Answer

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