answers to ch 17

Answers to Ch. 17

I have no degrees key in blogger. Almost all numbers are numbers of degrees.

31 a. 53, b. 106
33 1.46
41 a. 25, b. 29
42 1.24 *10^8m/s
54 red light, 12, blue light 11.8
57 angle in glass is 28, strikes upper side at 62 from normal, reflects, strikes far side at 28 from normal, refracts into air at 45.
58 note incident angle is 30. for red 19.3, blue 19.1,

Light Unit

Goals:
1. What is Light?
Be able to describe and give effective examples of the strengths and weaknesses of the two models of light.

2. How does light behave?
A. Reflection:
i. What is the law of reflection?
ii. Be able to locate images and make ray diagrams.

B. Refraction:
i. What is refraction?
ii. What is Snell’s Law?
iii. How did we determine a law for refraction?
iv. Be able to solve problems and draw ray diagrams.

C. Colors:
i. What are primary, secondary and complementary colors?
ii. How are colors produced by dispersion, addition and subtraction of light?

D. Lenses:
i. Be able to draw ray diagrams for converging and diverging lenses.
ii. Identify images as real or virtual.

E. Others:
i. Explain the production of rainbows and the color of the sky and sunset.
ii. Summarize how diffraction and interference apply to light.

Assignments (tentative)

Color Concept Development Worksheet 28-1 due 2/25
Reflection concept development sheets 29-1, 29-2 due 2/27
Data tables and graphs for refraction lab due 3/2
Refraction Lab report due 3/10
Snell’s Law Worksheet due 3/11
Testing a Particle Model of Light due 3/13
Read Chapter 17 : Questions 31,33,41,42,54,57,58 due 3/16
Lens Worksheets due 3/20
Review Handouts due 4/2

Unit Test April 3