Physics - Unit 14 Test

1. When light goes from low index of refraction to high index of refraction it bends towards the normal
2. High to low bends away from the normal
3. There will be a question about semi-circle about how ray goes in it refracts but when it goes out it doesn’t refract
   1. going to see this at least 3 times
4. You can see a fish in a tank 3 times, and at none of those places are where the fish actually is
   1. Probably going to be some little baby seal question
5. oscilloscope (50 MCQ on the final day)
6. 1 - 2 questions about dispersion
   1. Dispersion - Different colors refract different amount
7. P. R51 # 139 on the test
   1. wont be as complicated
8. When an object has an index of refraction similar to the medium it’s in the object seem to disappear
9. 3 Lens on this unit’s FRQ
10. Alaadin’s head doesn’t seem to be connected to his torso
11. Critical Angle
    1. Total Internal Reflection
    2. Light cannot escape
    3. If angle is higher than critical angle then light reflects
    4. Critical angle ${\theta }_c$ = sin${}^{-1}$($\frac{n_{refraction}}{n_{incidence}}$)
       1. n${}_r$ ALWAYS has to be less than n${}_i$
12. Prism problem on the test
    1. Rhombus not pentagon
    2. Find critical angle, find angle of refraction when light ray goes into object, when does it leave the object,
13. Telescope on the test (2 lens on telescope)
14. If you are given a concave lens the image will be… (mark all that apply)z
15. Which has a shorter focal length more curved or less curved?
16. Convex
    1. Smaller
    2. Image Distance negative
    3. Focal Length negative
    4. Imag
17. 3 Problems from Lenses
    1. Concave
    2. Convex
18. Telephoto Lens have a bigger focal length
19. HW # 26 most questions like that on the test
20. Magnification of compound system is just to multiply magnification of each lens

Final §

• Find the frequency of the unknown device on the table using oscilloscope, you will use circuits to build it

Demonstrations §

Prism §

• Light goes in prism, it refracts and it comes out in a different position

Semi-circle prism §

• Light goes in it refracts but it comes out at the same angle as it goes in

Double Rainbow §

• In the top one red’s on the bottom and bottom one red’s on the top

Mirage §

• Hot air has a higher index of refraction than cold air
• This causes a refraction of light which causes light to pile up

Flower Fishing Line §

• The reason the light comes out the end is because the angle at other spots is always greater than the critical angle so it can only come off the end of the fishing line

Water Cork §

• Laser goes in water and when the water pours out the laser keeps refraction in the water and we see the water stream be red