Homework Due Friday March 25

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1) Finish all "Questions for Thought" questions
Think about each question and all that it is asking.  Refer to your class notes and the textbook to ensure that you completely understand the subject material.  Write a thorough and complete answer to the question.  Remember what we discussed in class and how best to earn full marks on IB questions.  Write your answers as though you were giving them on an IB exam.

2) Answer the following questions from the "Light" documents

39) The light ray model is used to describe which laws?  Explain how this model accounts for certain properties and behaviors of light.

40) How does light interact with dust in the air?

41) Explain why, even though a table blocks light that falls on it from above, we are still able to see under the table (it is shaded under the table yet not completely dark).

42) If vertical light rays (i.e. light rays that hit straight on making a 90 degree angle with the object) strike a transparent object, describe what happens to the rays in detail.  3 things will happen – describe each thing clearly.

43) Explain the relationship between transmission and refraction.

44) Explain why you can partially see your own reflection in a glass window when it’s dark outside the window.

45) What is a normal line with respect to a reflecting surface?  Draw a sketch.

46) Suppose a block is x centimeters from a mirror.  I can see the reflection of the block in the mirror.  How far behind the mirror does the “virtual image” of the block appear to be?

47) What are diverging rays of light?

48) Give an example of a virtual image and a real image.

49) Which type of mirrors are used to see an object enlarged?

50) What is a reflecting telescope?

51) What causes refraction?

52) Draw a diagram showing a light wave traveling from air to water with some incident angle theta. Show the direction of the refracted light and label the angle of refraction.

53) Draw a diagram showing a light wave traveling from water to air with some incident angle theta. Show the direction of the refracted light and label the angle of refraction.

54) Draw a diagram showing a light wave traveling through air and striking the surface of water at 90 degrees (normal to the surface).  Show the direction of the refracted light and label the angle of refraction.

55) Does light bend more (i.e. refract to a larger degree) when the angle of incidence is large or small?

56) What is fiber optics?