1. Rainbows

2. Purpose To tell how a rainbow, sundog, and a double rainbow is created. To tell how a rainbow, sundog, and a double rainbow is created. To inform how a rainbow is made in the sky. To inform how a rainbow is made in the sky. To demonstrate what a rainbow really is made of. (reflection, refraction, and dispersion) To demonstrate what a rainbow really is made of. (reflection, refraction, and dispersion)

3. Materials Prism Prism Mirrors Mirrors Flashlight Flashlight Red and Blue lasers Red and Blue lasers Lamp Lamp Wine Glass Wine Glass We also used: Sunlight Sunlight Water Water A wall A wall Shade Shade A dark room with a window A dark room with a window

4. Procedures We tried to make a rainbow with a flashlight’s light through the prism. We tried to make a rainbow with a flashlight’s light through the prism. Tried with a red and blue laser. Tried with a red and blue laser. Tried with a mirror underneath the prism, and the flashlight. Tried with a mirror underneath the prism, and the flashlight. Flashed a light through the prism with a wall behind it, outside. Flashed a light through the prism with a wall behind it, outside. Went outside and tried with the prism alone in the sun. Went outside and tried with the prism alone in the sun. Went outside and tried with a mirror underneath the prism in the sun. Went outside and tried with a mirror underneath the prism in the sun.

5. Procedure continued Filled a wine glass with water, placed the glass in front of the window, while the sun’s rays were going through the glass. Filled a wine glass with water, placed the glass in front of the window, while the sun’s rays were going through the glass. Placed the prism in front of a lamp with a wall behind the prism, inside. Placed the prism in front of a lamp with a wall behind the prism, inside. Placed the prism in front of a lamp with a wall behind the prism, outside. Placed the prism in front of a lamp with a wall behind the prism, outside.

6. Results Flashlight and prism: Successful, but the rainbow’s colors were weak, and when the flashlight’s light went through the prism, it only displayed three of the rainbow’s colors; red, yellow, and blue. Flashlight and prism: Successful, but the rainbow’s colors were weak, and when the flashlight’s light went through the prism, it only displayed three of the rainbow’s colors; red, yellow, and blue. The red and blue laser going through the prism was not successful. The red and blue laser going through the prism was not successful. Flashlight and mirror: The same results as the first attempt with the flashlight, but the rainbow was a little stronger. Flashlight and mirror: The same results as the first attempt with the flashlight, but the rainbow was a little stronger. Flashlight and wall outside: The same results as the first and second results, but the rainbow was very clear and bright. Flashlight and wall outside: The same results as the first and second results, but the rainbow was very clear and bright.

7. Results Continued Sunlight: Very successful. The rainbow was very bright and clear. Sunlight: Very successful. The rainbow was very bright and clear. Sun and mirror: The same results as the one above. Sun and mirror: The same results as the one above. Wineglass and water and sunlight: It was successful; it worked exactly like the prism, except that the rainbow appeared on the floor, instead of the ceiling. Wineglass and water and sunlight: It was successful; it worked exactly like the prism, except that the rainbow appeared on the floor, instead of the ceiling.

8. Results continued Lamp and wall inside: Almost successful. The light was too bright, so we couldn’t see the rainbow clearly. Lamp and wall inside: Almost successful. The light was too bright, so we couldn’t see the rainbow clearly. Lamp and outside: Same results as the first attempt inside, but the rainbow was much weaker. Lamp and outside: Same results as the first attempt inside, but the rainbow was much weaker.

9. Conclusion We concluded that working outside was much more effective than being inside. The sun was way more powerful than a teensy flashlight or lamp. We concluded that working outside was much more effective than being inside. The sun was way more powerful than a teensy flashlight or lamp.