Optics

The lens equation provided in the instructions for this lab apply to all lenses regardless of their thickness. True False

The focal length of a lens is the distance between the lens and the point along the lens' central axis where light rays do/would converge to a point. True False

Question 1 Introduction: In a paragraph between 150 and 250 words explain what the theory behind this experiment was. If you are using external resources include the reference. You need to include any relevant formulas and explanation of each terms as well. You may use the rich formula tools imbedded here.

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?

1. Hold a polarizing film in front of your eye and look at the fluorescent light in the lab. Is there any change in light intensity with and without the polarizing film in front of your eye? Why? 2. Rotate the polarizing film through 360 degrees when you are looking at the fluorescent light. Is there any change in light intensity due to the rotation? Why? 3. Hold two polarizing films together in front of your eye and look at the fluorescent light. Rotate one of the two films through 360 degrees. Is there any change in light intensity due to the rotation? Why?

7. Question on Measurement #1 (a) Explain why both I2 (theory) and I2 (exp.) curves in Fig. 6 have two full minima and maxima. (b) How many minima and maxima do you expect in the curve of E, vs , (Fig. 3) in the range 0-360?

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?

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?

7. For thin lenses, what is meant by the two radii of the lens? How does one tell, given the setwo radii, what kind of lens it is? From these radii, how does one find the focal length of the lens? What is the "lens maker's equation?"

A ray of light is incident at the interface between medium A and medium B as shown in Figure 1a. The refractive index of medium A and medium B is 1.42 and 1.31 respectively. The light ray is totally internally reflected back into medium A. After that, medium B is replaced with a layer of water that has a refractive index of 1.33 as shown in Figure 1b. Determine if total internal reflection will also occur at the Medium A-water interface in Figure 1b. Assume that the incident angle in Figure 1a is the same as the incident angle in Figure 1b. Show your workings clearly and explain your reasoning.