1. Made from Dots

Name ______Per. _____

The Virtual Science of Light - 5 web sites and several tasks. Record your answers below:

1.  Made from Dots http://www.learner.org/teacherslab/science/light/color/dots/madefromdots_1.phtml

The complimentary colors of light are cyan, magenta, and yellow. Use the select tabs on the website to choose the levels of cyan, magenta, and/or yellow to make the first three colors they give you. Write the color in the box provided.

Name ______Per. _____

Cyan _____%

Magenta _____%

Yellow _____%

Cyan _____%

Magenta _____%

Yellow _____%

Cyan _____%

Magenta _____%

Yellow _____%

Name ______Per. _____

2.  Colored Shadows http://www.learner.org/teacherslab/science/light/color/shadows/index.html

The primary colors of light are red, green, and blue. There is a java image on the screen that looks the one below. See how each part is labeled so you can determine what happens when you change the colors of the light bulbs.

Shadow of both light bulbs together.

Shadow of right light bulb Shadow of left light bulb

Light bulbs

Click on the light bulbs to change their colors and record the shadows created. The first one is done as an example

White + White light bulbs = ____grey____ left shadow + ___grey_____ right shadow = __white____ combined shadow

Red + Green light bulbs = ______left shadow + ______right shadow = ______combined shadow

Red + Blue light bulbs = ______left shadow + ______right shadow = ______combined shadow

Blue + Green light bulbs = ______left shadow + ______right shadow = ______combined shadow

·  What happens if there are three different-colored lamps instead of two?

·  How can it be that light and pigment have different primary colors?

3.  Stellar Spectra http://www.learner.org/teacherslab/science/light/color/spectra/spectra_1.html

Compare the spectra of calcium, hydrogen, iron, and magnesium and to at least three different stars’ spectra. Identify which elements are in each star:

1st star:______

2nd star:______

3rd star:______

4.  Fun House Mirrors http://www.learner.org/teacherslab/science/light/lawslight/funhouse/index.html

Read the first page and circle your hypothesis (1 or 2) below. (The website incorrectly calls it a theory)

Hypothesis 1: The concave mirror makes you tall, while the convex mirror makes you short.

Hypothesis 2: The convex mirror makes you tall, while the concave mirror makes you short.

Look at the three pairs of images below. The first is always a reflection from a regular flat mirror. The second is a fun house mirror with three parts. Identify what shape each of the three parts of the fun house mirror should be in order to make the image shown. Choices are convex or concave.

5.  How Are Lenses Used to Correct Vision http://www.glencoe.com/sites/common_assets/science/virtual_labs/E11/E11.html

Patient / Vision Diagnosis
(Far or Near sighted) / Corrective Lens Type
(Convex or Concave) / Lens Strength
(thin, medium, or thick)
1
2
3
4
5
6

I.  Click the “optics” button and answer the following questions:

a.  Describe the shape of a convex lens and explain what it does to light.

b.  Describe the shape of a concave lens and explain what it does to light.

II.  For each patient, look at their vision and then determine if they are far sighted or near-sighted, if they need convex or concave lenses, and if they should be thin, medium, or thick. Record your answers in the table above.