LensesMirrors
Documents you may need:
Lenses & Mirror Reference Sheet (pdf or google doc)
Planar Mirror Lab (pdf or google doc)
Curved Mirror Lab (pdf or google doc) If you were absent complete this version (pdf or google doc) using this video.
Concave Mirror Lab (pdf which is better than the google doc) If you were absent complete this version (pdf or google doc) using this simulation (When the word "Subscription" pops up, just Refresh the page in order to continue using the simulation).
Anamorphic Mirror Lab (pdf or google doc) if you want extra Anamorphic graphs (pdf or google doc)
Lenses Lab (pdf or google doc) There is no online equivalent, you must come in after school to complete the lab.
Magnification Lab (pdf or google doc) There is no online equivalent, you must come in after school to complete the lab.
Mirror Ray Diagrams (pdf or google doc)
Lenses Ray Diagrams (pdf or google doc)
Microscope Lenses worksheet (pdf)
Lenses & Mirrors Unit Review (pdf or google doc)
Lecture Notes you may need: (You will need to be signed in to your PUSD Google account in order to view them)
Homework Help:
May 31st, 2016: Lenses and Mirrors Homework Packet
pg. 463 #6, 9, 10
pg. 478 #31-36; pg. 473 #22-24, 27, 28
Mirror Ray Diagrams
pg. 499 #25, 27; pg. 480 #61-63, 77, 79, 81
Pg. 496-497 #15, 16, 17, 20, 22, 23
Lenses Ray Diagrams
Daily Warm-up Questions (6)
May 19/ 20, 2016 - Mirror Ray Diagrams (Solutions can be found here)
There are always 3 rays that we draw in our diagrams:
1. From the top of the object towards the mirror parallel to the optical axis and it reflects lined up with the focal point. The sight line would extend back from the reflected ray through the focal point.
2. From the top of the object towards the mirror as if it would go through the focal point and it reflects parallel to the optical axis. The sight line would extend back from the reflected ray; parallel to the optical axis.
3. From the top of the object to the point on the mirror where the optical axis meets it and it reflects at the same angle it entered. The optical axis serves as a normal for the incident angle and refracted angle. The sight line would extend back from the reflected ray.
Don't forget to characterize the image! Bigger or smaller or the same size? Erect or inverted? Real or virtual?
Below is an example of a ray diagram and there is a tutorial available here:
Thursday/ Friday May 28/29, 2015 Lens Ray Diagrams
There are always 3 rays that we draw in our diagrams:
1. From the top of the object towards the lens parallel to the optical axis and it refracts through the focal point on the other side of the lens.
2. From the top of the object towards the lens going through the focal point and it refracts parallel to the optical axis through the lens.
3. From the top of the object to the point in the lens where the optical axis meets it and it refracts through with no angle change.
If the rays diverge then extend them backwards as dashed lines.
Don't forget to characterize the image! Bigger or smaller or the same size? Erect or inverted? Real or virtual?
Below is an example of a ray diagram and there is a tutorial available here.
May 26th, 2015 pg. 478 #30, 37, 38, 54, 56; Pg. 480 #61-63, 77, 81, 84
pg. 478 is conceptual. Try drawing a diagram when discussing angles.
62. Use the magnification equation.
63. Use the magnification equation.
77. Remember that the radius is equal to twice the focal length for a spherical mirror. You are given the height of the object and the distance from the object to the mirror. (a) Use the focal length equation to find the distance from the image to the mirror. (<30) (b) Given that distance use the magnification equation to find the height of the image. (<2)
81. (a) First consider the characteristics of the image to determine the type of mirror (convex or concave). (b) You are given the magnification and the object distance. Using the magnification equation determine the image distance. Once you have that image distance you can insert that with the object distance into the focal length equation. When you determine the focal length remember that twice the focal length is the radius of curvature. (>30)
84. You are given the object distance and the height of the object. Given the height of the image you can use the magnification equation to find the image distance. With that and the object distance you can use the focal length equation to calculate the focal length. (<1m)
May 19th/ 20th, 2015 pg. 473 #22-24, 27, 28
23. The do is 20 cm and the focal length is 9 cm. Since it is a concave mirror it has a positive focal length. Use focal length equation to calculate the di.(<1)
24. Similar to #23 but you are looking for the do this time. (<30)
27.You are given ho, hi and do. Since it is a convex mirror you know a few things: it will only produce a virtual image that is smaller than the object and erect. Since it is erect the hi will be positive. Since it is a virtual image the di will be negative since it will be behind the mirror. Use the magnification equation to calculate the di. Once you have di and do you can calculate the focal length of the mirror. Since it is a spherical mirror the focal length is roughly equal to half the diameter. (<30)
28. The magnification of the image and its equal to 0.66667. The do is given so you can use the magnification equation to calculate the di. Now that you have di and do you can calculate the f. (<40)