Simple Spectroscope

MATERIALS:

· Paper cup

· CD

· Black Pen

· Cutter

PROCEDURE:

$テキストボックス: A spectroscope is a device that breaks up light into spectrum of color using diffraction grating. The diffraction grating splits and diffracts light into several beams into different direction. On the hand, CD is composed of spiral track of data which is 1.6microns away from each other, very tiny distance that can only be seen in a microscope. This makes very tiny grooves in the CD. This grooves serves as a diffraction grating. When the incoming light hits the grooves, each groove reflects light waves separately in all different direction. The colors that we see are the result of the superposition of all the individual waves.$

Taking it further

1. Use the spectroscope in different time of the day and notice the change in size of the colors.

2. Use the spectroscope using variety of light source such as incandescent, flashlight, computer monitor and the likes.

Simple Spectroscope

1. Color the inside of the paper cup using black pen as shown in the picture.

2. Draw a line in the center part of the cup dividing the cup into two as shown in the picture.

3. At the back part of the cup, measure 5 cm from the lid of the cup and mark it with black pen.

4. At the front part of the cup make marks and measurements as shown in the photos.

5. Cut the square using cutter.

6. Cut a centimeter wide slit in the top center of the paper cup.

7. Starting on the marked point at the back portion of the cup, cut the cup until it reaches the two marks in front of the cup as shown in the photo.

8. Insert the CD on the cut portion as shown.

9. Look on the window (square in the front) of the spectrometer under the sunlight. What can you see? Try it under a fluorescent light.

Under the sunlight

Under fluorescent light

テキストボックス: EXPERIMENT LISTS PHYSICS Balancing a Dragonfly Does Air Takes Up Space? Improvised Battery (Option 1) Improvised Battery (Option 2) Improvised Battery (Option 3) Tornado in the Bottle Diver Surface Tension and Air Pressure Aluminum Wrap Railway Light to Sound Magnetic field in 3D Simple Kaleidoscope Art in Polarizer Simple Spectroscope Electrostatic Motor Paper Earphone CHEMISTRY Vegetable/Fruit Charcoal Red Cabbage Extract (Identifying Acidity of a Liquid) Alkalinity of a Liquid Crayon Making Hand Printing using Soap Testing Raindrop Acidity using Red Sweet Potato Powder Magic! (Water doesn’t fall?) BIOLOGY 1. Leaves Puzzle ACTIVITIES Fossil Hunting Gold Sieving Smelting Steel Observing Classes Attending Trainings