Optics

Which of the following describes how to calculate the magnification?

2. For each of the following pairs of travelling wave pulses, sketch by hand what the string will look like at the moment the two waves coincide. State also whether each scenarios constructive or destructive. (Include the original pulses as shown below in your sketch for the purposes of comparing the amplitudes of the pulses and the resulting interference.)

3. Find the polarization of the light after passing through the optical component below.

a) Two plane mirrors meet at and angle of 135°. If a light ray strikes one mirror at an angle of 35°, at what angle O does it leave the other mirror? b) A person whose eyes are 1.7 m above the ground stands 2.3 m in front of a vertical plane mirror whose bottom edge is 0.38 m above the floor. What is the horizontal distance x from the base of the wall that is supporting the mirror of the nearest point on the floor that can be seen reflected in the mirror? Hint: It may help to draw a picture for this situation.

1-3. Two 1-km fibers are spliced together.Each fiber has a 5-dB loss and the spliceadds 1 dB of loss. If the power enteringis 2 mW, then how much power is deliv-ered to the end of this combined trans-mission line?

8. The flame of a lit candle is exactly 1.50 m from a nearby wall. You have a convex and aconcave lens. (a) Which of the two lenses should you use if you wish to create a real image of the candle on the nearby wall?[1 mark] (b) You find that by holding the correct lens at a distance of exactly 23.8 cm from the flame the image on the wall is in focus. Calculate the focal length of the lens. [2 marks] (c) Sketch a ray diagram (by hand) for the candle-lens-wall scenario. Be sure to clearly indicate the focal points, object, and image, and include at least three rays. [4 marks] (d) Using the same lens, you now head outside and try to focus the sun's light on a single point on the ground. At what distance from the ground should you hold the lens?[1 mark]

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?

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?"

concave interface with radius of curvature R 0 curved interface =

1. What is the total magnification of a compound light microscope with objective lens magnification of 40' and ocular lens of 10'? How did you arrive at your answer? 2. Why is immersion oil necessary at 1,000 but not with the lower power objective?