Visible Light a. Visible light is the only type of Electromagnetic (EM) wave which we can $$ \qquad $$ - b. Which color of light has the longest wavelength? $$ \qquad $$ c. Which color of light has the shortest wavelength? $$ \qquad $$ d. List the colors of visible light in order from longest wavelength (lowest frequency) to shortest wavelength (highest frequency) e. What is a device that separates visible light into the colors above? Ultraviolet (UV) Radiation a. UV waves have $$ \qquad $$ energy than visible light. b. Give 1 way UV radiation can be helpful to humans: c. Give an example of how UV radiation can be harmful to humans. X-Rays a. X rays have a $$ \qquad $$ frequency and $$ \qquad $$ wavelength than UV rays. They carry a large amount of $$ \qquad $$ X rays can penetrate most matter. b. Give 2 uses of x -rays: Gamma Rays a. Gamma rays have the $$ \qquad $$ energy of all of the waves. b. How can gamma rays be helpful to people? Review Question: What happens to ENERGY as you go from Radio Waves to Gamma Rays?

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### Visible Light
a. Visible light is the only type of Electromagnetic (EM) wave which we can **see**.

b. Which color of light has the longest wavelength? **Red**.

c. Which color of light has the shortest wavelength? **Violet**.

d. List the colors of visible light in order from longest wavelength (lowest frequency) to shortest wavelength (highest frequency):
   - Red
   - Orange
   - Yellow
   - Green
   - Blue
   - Indigo
   - Violet

e. What is a device that separates visible light into the colors above? A **prism**.

### Ultraviolet (UV) Radiation
a. UV waves have **more** energy than visible light.

b. Give 1 way UV radiation can be helpful to humans: UV radiation helps the body produce **vitamin D**.

c. Give an example of how UV radiation can be harmful to humans: UV radiation can cause **skin cancer**.

### X-Rays
a. X rays have a **higher** frequency and **shorter** wavelength than UV rays. They carry a large amount of **energy**. X rays can penetrate most matter.

b. Give 2 uses of x-rays:
   1. **Medical imaging** to view the inside of the body.
   2. **Security screening** at airports to check luggage.

### Gamma Rays
a. Gamma rays have the **highest** energy of all of the waves.

b. How can gamma rays be helpful to people? Gamma rays can be used in **cancer treatment** to kill cancer cells.

### Review Question
What happens to ENERGY as you go from Radio Waves to Gamma Rays? As you go from Radio Waves to Gamma Rays, the **energy increases**.
**Visible Light:** a. We can **see** visible light. b. **Red** has the longest wavelength. c. **Violet** has the shortest wavelength. d. Order from longest to shortest wavelength: Red, Orange, Yellow, Green, Blue, Indigo, Violet. e. A **prism** separates visible light into colors. **Ultraviolet (UV) Radiation:** a. UV waves have **more** energy than visible light. b. UV helps the body produce **vitamin D**. c. UV can cause **skin cancer**. **X-Rays:** a. X rays have a **higher** frequency and **shorter** wavelength than UV rays. They carry **energy** and can penetrate most matter. b. Uses: **Medical imaging** and **security screening**. **Gamma Rays:** a. Gamma rays have the **highest** energy. b. Gamma rays can be used in **cancer treatment**. **Review Question:** As you go from Radio Waves to Gamma Rays, **energy increases**.

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