Do Now: 5/13A 3.5 cm object is 9 cm to the

left of a concave mirror of 6 cm focal length. The image is located 18 cm from the mirror. Find the image height.

Do Now:

•Make a list of concepts you will need to know for your test

Review: Types of Images

Image Size Enlarged Reduced

Image Orientation

Upright (Erect)

Inverted

Type of Image

Real Virtual

Review: Images Produced

do di m imagedo>C C>di>f Reduced,

invertedReal

C>do>f di>C Enlarged, inverted

Real

f>do (negative) Enlarged, erect

Virtual

Do Now (5/24/12)

• Come in quietly, pass in your art piece and your Refraction Phet Lab, then wait for further instructions.

*Reminder – Light Review Packet due tomorrow AND Light TEST tomorrow!

Ms. Timson’s

Review to Conquer Physics

Rules of the Game• There will be tribes, as divided by the teacher• For each problem which appears on the slide, the tribe will be able to work

together to vote on one answer given only the time which will be written on the slide.

• Tribes cast their answer using their voting cards only in the time allowed.• Each team with a correct answer is allowed to cast one vote to remove

another tribe from the island. The teacher will have each tribe cast their vote simultaneously by writing the color of the tribe they are voting for on their white board. The teacher will then remove tribes from the island.

• The teacher will track which tribes are in and which tribes are out of the game with signs on the board.

• If a tribe is voted out, they can reenter the game by answering the next question correctly to reenter. They will NOT receive a vote for that question but must wait until the next question.

• Winning tribes will be those still on the island at the end of the game.• ***The teacher will be the final judge of any conflicts or confusions – and

remember, be respectful and be honest!

1. Which has the larger critical angle in air?

A)crown glass (n = 1.52) B) flint glass (n = 1.61)

55 seconds

2. The speed of light is greatest in ______ .A)glass B) diamond C) water D) vacuum

10 seconds

3. Place in order from longest wavelength to shortest wavelength:

1 – visible light 2 – gamma rays 3 – microwaves 4 – radio waves 5 – ultraviolet

A)5,2,1,3,4 B) 2,3,5,1,4 C) 4,3,1,5,2 D) 3,1,4,2,5

35 seconds

4. How long does it take light to travel from this text to your eyes? Assume a distance of 50.0 cm. The speed of light is 3 x 108 m/s.

A.1.67 x 10-7 sB. 1.67 x 10-9 sC. 0.15 sD. 0.001 s

45 seconds

5. How far would light travel in 2.5 minutes?A.4.5 x 1010 mB. 7.5 x 108 mC. 2 x 106 mD. 1.2 x 108 m

40 seconds

6. Orange light has a wavelength of 6 x 10-7 m. What is its frequency?

A.5 x 1014 HzB. 180 HzC. 2 x 10-15 HzD. 2 x 1015 Hz

7. Light of which of the following colors has the shortest wavelength?

A.redB. blueC. yellowD. green

15 seconds

8. Dispersion is the term used to describe _____.A.the splitting of white light into its component

colors in refractionB.the propagation of light in straight linesC.the bending of beam of light when it goes from

one medium to anotherD.the bending of a beam of light when it strikes a

mirror20 seconds

9. In a vacuum, the speed of light _________________.

A.depends upon its frequency B.depends upon its wavelength C.depends upon the strength of its electric

and magnetic fields D.is a universal constant 15 seconds

10. After passing from one material into another, a light ray makes an angle of refraction of 39º. If it came from a medium with index of refraction 1.05 and passed into a medium with index of refraction of 1.13, what angle did the ray make when it was in the first medium?

A.35.79ºB. 30.21ºC. 42.63ºD. 39.98º

65 seconds

11. What is the speed of light in ethanol? The index of refraction of ethanol is 1.36.

A.2.21 x 108 m/sB. 4.08 x 108 m/sC. 2.98 x 108 m/sD. 2.76 x 108 m/s

30 seconds

12. Which of the following statements is TRUE about the index of refraction of a material medium?

A.It is a negative number.B.It is equal to 1.C.It is between 0 and 1.D.It is greater than 1.

20 seconds

13. When a beam of light enters one medium from another, which of the following quantities never changes?

A.directionB. speedC. frequencyD. wavelength

15 seconds

14. When you look at yourself in a plane mirror, what kind of image will you see?

A.real image behind the mirror B.virtual image behind the mirrorC.real image in front of the mirrorD.virtual image in front of the mirror

20 seconds

15. How does the angle of incidence compare to the angle of refraction?

A.is smaller B. is the sameC. is largerD. may be A, B or C

10 seconds

16. A 5.00-cm tall object placed 45.0 cm from a concave mirror having a focal length of 15.0 cm. What is the image distance?

A.-22.5 cmB. 22.5 cm C. -11.25 cmD. 11.25 cm

55 seconds

17. A 5.00-cm tall object placed 45.0 cm from a concave mirror having a focal length of 15.0 cm. What is the height of the image in #16?

A.-2.5 cmB. 2.5 cmC. 1.25 cmD. -1.25 cm

55 seconds

18. After passing from one material into another, a light ray makes an angle of refraction of 11.63º. If it came from a medium with index of refraction 1.74 and passed into a medium with index of refraction 1.35, what angle of incidence did the ray make when it was in the first medium?

A.9.0ºB. 11.63ºC. 13.21ºD. 14.32º 70 seconds

• At the interface between two materials, a light ray is at an angle of incidence of 45º on a side with an index of refraction of 1.11. If the light is at an angle of 34.49 º on the other side of the interface, what is the index of refraction on this side?

• A. 0.89 B. 1.12 C. 1.25 D. 1.39

45 seconds

55 seconds

• Where should an object be placed in front of a concave mirror to produce an erect image?

A.less than f B. equal to fC. between f and 2f D. greater than 2f

55 seconds

• The image formed by a concave mirror is larger than the object at which object distance?

A.Less than 2f B. more than 2f B.C. any value D. none. It is not possible.

• An object farther from a converging lens than its focal point always has an image that is _____.

• inverted B. virtual C. the same size D. smaller in size

55 seconds

55 seconds

• Relative to its object, a real image formed by a lens is always _____.

• erect B. inverted C. smaller D. larger55 seconds

• The image of an object 10 cm from a lens is located 10 cm behind the object. What is the focal length of the lens?

• +6.7 cm B. -6.7 cm C. +60 cm D. -20 cm

55 seconds

• An object is located 10 cm from a converging lens of focal length 12 cm. What is the image distance?

• +5.5 cm B. -5.5 cm C. +60 cm D. -60 cm 55 seconds

Congratulations!Good luck tomorrow!

I know you can conquer your test