Part 1: Simulation Exploration

is my work good

1. Open the simulation and Light Bulb option. Explore the simulation and describe what variables you can control and what happens when you adjust these controls. Enter your explanation below.
	Tools Available and Check: Bulb Color Flashlight Filter Color Build Options: Show human face Show brain
In the simulation, I can control the color of the filter and the light bulb. I can also turn the flashlight on and off. I also have the option to switch to either the human face or the brain view. In the simulation, I can control the color of the filter and the light bulb. I can also turn the flashlight on and off. I also have the option to switch to either the human face or the brain view. When I adjust the bulb color slider, it changes the color of the flashlight coming out. When I adjust the filter color slider, the filter changes into a variety of colors, and it only lets its own color of light pass through.

2. Click the red button on the flashlight to turn it on. Turn on the Brain image. The color in the thought bubble represents the color that the person sees in their mind. Adjust the two sliders and the button on the arm coming out of the filter color slider. Describe what happens.

When I turn on the flashlight, a colored light shines toward the filter. When the brain view is turned on, the color in the thought bubble represents the color the person sees through the light. When I adjust the bulb color slider, the color of the light changes to that color. For example, if red is being shifted to color blue. When I move the filter color slider, the filter changes color to the one that matches the bulb color and blocks out the other colors. For example, a red filter won't filter out red. However, the red filter will block out other colors such as green and purple. Thus, if the bulb and filter color match, the brain bubble shows that color. If the bulb does not match the filter, the brain bubble is black, indicating that no light passes through, and the person does not see the color.

You can clear and reset your screen by clicking the orange round arrow on the lower right side of the screen. Reset your screen to have a fresh simulation page.

Part 2: Light Bulb Simulation

3. What does the person see if you put red light through a red filter?

If you put the red light through a red filter, the person will still see red light.

4. What does the person see if you put violet light through a red filter?

If you put the violet light through a red filter, the person will see nothing.

5. What does the person see if you put violet light through a violet filter?

If you put the violet light through a violet filter, the person will see violet light.

6. Experiment with the colors of filters and lights. Do the filters 'filter out' the color they are or the other colors? Explain.

The filters do not filter out the color they are. They do filter out the other colors. For example a blue filter won't filter out blue. However, the blue filter will block out other colors such as green, orange, red, etc.

Switch the flashlight to white light by clicking the white light bulb above the flashlight.
	Tools Available and Check: Bulb Color: White (left choice above red dot) Flashlight: Beam (left choice below red dot) Turn on Filter Switch: On Build Options: Show human face

7. Investigate with the different filter colors while shining white light from the flashlight. Select three (3) filter colors and write them in the column below. Next, observe and record the color of the light entering the eye. For example, what happens when you put the following color filters in front of the white light source?
Filter Color	Color of Light Entering Eyes
Orange	Orange
Blue	Blue
Red	Red

You can clear and reset your screen by clicking the orange round arrow on the lower right side of the screen. Reset your screen to have a fresh simulation page.

Part 3: RGB Bulb Simulation

Select the RGB Bulbs Tab on the simulation screen.
	Available Colors: Red (Adjustable slider) Green (Adjustable Slider) Blue (Adjustable Slider) Build Options: Show human face

8. When you adjust the slider on the color flashlights, particles are emitted. What are there particles?

The particles that are emitted in the color flashlights simulation are photons which is the fundamental particles of light.

9. Where and how are these particles generated in the model simulation?

Photons are usually generated at the light source; In this simulation it is the flashlight. When you adjust the sliders, it produces photons directly from the top of the flashlight, emitted into the air.

10. Set the flashlights to the following settings to determine the resulting light.
Note: 100% means toggle slider switch all the way to top. 50% means toggle switch half way. Etc.
	What color is seen by the person in the simulation?
Trial	Red (%)	Green (%)	Blue (%)	Light Seen?
1	100	100	100	Yes, white
2	0	0	0	No, black
3	0	100	100	Yes, light blue
4	100	100	0	Yes, yellow
5	100	0	100	Yes, dark pink
6	50	50	50	Yes, light grey
7	25	25	25	Yes, dark grey

11. Arrange the following and describe the resulting color. Note: 1.0R means red at 100% intensity; 0.5G means green at 50% intensity For example: 1.0R + 0.5G + 0.75B means: Red Slider all the way up, Green Slider 1/2 way up, Blue Slider 3/4 up.
Trial	Color Equation:	Color Produced
1	0.5G + 1.0B =	Blue
2	0.75R + 0.25G + 1.0B =	Purple
3	0.50R + 0.25G + 0.25B =	Brown
4	0.75R + 0.5G + 0.25B =	Darkish Orange or Light Brown
5	0.65R + 0.35G + 1.0B =	Purple
6	0.45B =	Dark Blue
7	1.0R + 0.81R + 0.34B =	Light Yellow
8	0.85R + 0.5G + 0.10B =	Orange

bar graph of three (3) trials showing the relative RGB mixtures with color name. Insert your graphs below. Here you can view a video on creating a bar in Google Sheets or Excel. Title each graph the appropriate color.

Part 4: Applications

13. View the video below and answer the following question. Based on the information in the video, how do light waves interact with objects to allow us to see in color?

Seeing Color

Light is a type of wave, and only certain wavelengths can be detected by the human eye. Each of these wavelengths corresponds to a different color. A mix of colors in white light allows us to see colored objects. For example, when sunlight hits a beach ball, we only see the light that bounces off it. For example, the blue side reflects the blue light, and the wavelengths that don't bounce off get absorbed as heat. The color of light coming from an object is what gives it color. First, light travels into the eyes to the retina (back of the eyes). The retina is covered with millions of light-sensitive cells called rods and cones, which detect light and send signals to the brain. Nerve signals from the eyes are sent to the brain along the optic nerve. Then, the brain will decode these nerve signals to recreate the image. The optic nerves carry these nerve signals to the visual cortex at the back of the head. Finally, various parts of the brain analyze color and shape, and a conscious perception is created.

14. Define the following terms by writing them into the column matching the appropriate definition. Enter the following terms from column A into column B.
Column A	Column B
Retina Rods and cones Optic nerve Thalamus Visual cortex Prefrontal cortex
This part of the brain processes information from the senses and combines it with other kinds of information, such as memories and emotions.	Thalamus
This processes optical signals and combines them into new information.	Prefrontal cortex
This transmits signals from your retina to your brain.	Optic nerve
These react to different wavelengths, or colors, of light.	Rods and cones
This part of the brain combines signals into a full visual image.	Visual Cortex
Special cells called rods and cones live here.	Retina

15. Summary. The video mentions, 'Millions of different colors can be distinguished this way.' (3:00) Using the concepts associated with this investigation, explain what this statement means. Be sure to reference previous sections of this report to support your claims.

Millions of different colors can be distinguished because of, how light waves interact with objects and how our visual processes those signals. White light has many different wavelengths, and objects reflect specific combinations of these wavelengths, while some are absorbed as heat. Light travels into the eyes to the retina, which is covered with millions of light-sensitive cells called rods and cones. Rods and cones detect light and send signals to the brain. Cone cells help detect colors, and there are three kinds of cone cells. For example, some cones can respond more strongly to blue lights and other pulses faster in response to green. This indicates, every color stimulates more than one cone, and the combined response produces a unique signal for each color. These signals are sent through the optic nerve to the brain, where the visual cortex and various parts of the brain analyze and combine the information to form a complete image. Due to the brain's ability to interpret variations in wavelength mixtures and cone detection, humans can distinguish millions of different colors.