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Transcript for How to Build a Paper Quadrant
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| Time | Content |
|---|---|
| 00:00 → 00:05 |
♫ Opening Theme ♫ |
| 00:05 → 00:08 |
episode seven - How to Build a Paper Quadrant ♫ Jazzy background music plays throughout ♫ |
| 00:08 → 00:13 |
Start by visiting http://www.davidcolarusso.com |
| 00:13 → 00:16 |
and downloading the PDF document located at |
| 00:20 → 00:25 |
Print out this document, and simply follow the instructions. |
| 00:25 → 00:28 |
1) printed sheet 2) tape 3) a pen 4) a straw 5) loop of string |
| 00:28 → 00:41 |
♫ Jazzy background music plays throughout ♫ |
| 00:41 → 00:45 |
To find the altitude of an object, point the business end of the quadrant straight at it. |
| 00:45 → 00:48 |
Then read the number under the string. |
| 00:48 → 00:51 |
Usually you can do this by looking through the straw and aming. |
| 00:51 → 00:59 |
For the Sun, however, do NOT do this. Instead take something and hold it behind the quadrant. |
| 00:59 → 01:04 |
When the Sun is properly sighted, the rays of light from the Sun will be traveling parallel to the straw. |
| 01:04 → 01:10 |
This will cause the straw to cast a circular shadow as the Sun’s rays travel straight down the center. |
| 01:10 → 01:11 |
Good… |
| 01:11 → 01:12 |
Bad... |
| 01:12 → 01:13 |
Good… |
| 01:13 → 01:18 |
Then simply read the altitude. |
| 01:18 → 01:20 |
What do you think? |
| 01:20 → 01:22 |
Now that you have a quadrant, what can you use it for? |
| 01:22 → 01:25 |
Why don’t you try measuring the altitude of celestial objects over the course of several days? |
| 01:25 → 01:30 |
Do you have a question? Ask the explainer. explainer@davidcolarusso.com |
| 01:30 → 01:34 |
Special Thanks To |
| 01:37 → 01:40 |
Music from "Trafic de Blues" |
| 01:40 → 01:44 |
title track from |