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1. If a real object was placed upside down in front of a concave mirror at various points along the principal axis, what is a possible orientation of the virtual image?
A: It would be upside down since the object is reflected off the curve upside down.
2. How would you treat farsightedness?
A: You would use a convex lens to refract the images making close objects appear clearer.
3. When Sean tries to spear a tadpole in a pond he misses. Why?
A: Sean is bad. Also the light is reflected off the tadpole traveling through two different mediums refracting the light between the tadpole and Sean's poor vision.

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Tier 3 (1): Could you use light from the focal point of a convex mirror to cook an egg?
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Tier 3 (2): If our eyes contained triangular prisms (point facing the pupil, flat face towards the retina) instead of lenses, what would we see?
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1)When we go spear fishing, how can we use our knowledge of refraction to determine the position of the fish?
- The smaller the angle of incidence between my line of sight and the water, the closer I have to thrust my spear and the deeper I have to thrust it. Theoretically, if I'm on top of the fish (90 degrees) I just have to thrust the spear strongly.
2)How do two concave mirrors placed on top of each other- with the top mirror having a open hole- create a holographic image (of an object placed at the bottom of the mirror) above the hole?
- light from the focal point and then they travel parallel towards the the mirror. The object on Mirror A will be on top of the focal point of Mirror B. Light of Mirror B will go to Mirror A

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Tier 3 Questions
1. Why are concave lenses used for nearsightedness?
- Concave lenses diverge the light rays just enough so the focal point lies on the retina of the eye.
2. What would happen if you put an object between a concave lens and a convex lens?
-When looking at the object through the concave lens, the object will appear smaller. On the other hand, if one looks at the object through a convex lens, the object will appear magnified.

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1) How does a convex lens make objects appear larger?

Convex lenses cause the light to converge and enlarge the object. The focal point is also closer to your eye.
2) When you look through a  convex lens why is it that the image is larger and upright?

Since the real image is between F and the lens the converging light will make the image through the lens upright and larger.

3)What causes certain types of mirrors or lenses to refract or reflect?
Light varies depending on where on the principle axis they are travelling and how incident rays are travelling through the axis.
4)Why do certain lenses or mirrors happen to change the direction of a light source shining onto it?
When the lens is curved inward the resulting rays will diverge. While a lens that curves outward convex will cause rays to converge.

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1.
Tier 1- Which Lenses make the image upside down? Tier 3- Some lenses are converging, while others are diverging. In knowing that a given lens is converging, what could be said on its ability to make an image upside down? Why does this happen?
2.
Tier 2- When looking at images that are upside down, how is the light refracting?
Tier 3- Some mirrors, like those in fun houses, provide a refracted image when looked into. How do different mirror types affect the resulting image? Do different angles of incidence have the capacity to change the resulting image?

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1) How do magnifying glasses both let people see small objects as larger and allow them to focus light?
- The magnifying glass is a convex lens. This type of lens focuses light. The reason that it makes small objects appear bigger is because it focuses the light reflecting off the object into your eye. Since it focuses light, it can also focus sunlight to converge at one point.
2) If you stand in front of the mirror, and your virtual image appears smaller than you, what mirror are you in front of? What is your position in relation to the mirror?
- A concave mirror, since the the virtual image of a concave mirror is smaller than the real image. Your position would be between the focal point and the mirror surface.

Midterm Corrections:
21. B - Pendulum 1 has a frequency of 5 Hz. Since Hz is 1/seconds, to find the seconds of the period, the inverse is the answer. This is 1/5 which equals 0.20 sec. The same thing can be done for pendulum 2, which is 1/3=0.33.

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In order to have light rays that pass through two different lenses, what order must they be in?
- convex and concave
- concave and convex
- flat flat
If the curvature lessens, how does it affect the focal distance?
- It would get further away from the axis of symmetry.