Measurement Of Length
Chapter Name : Units And Measurements |
Sub Topic Code : 101_11_02_03_02 |
Topic Name : Measurement Of Length |
|
Sub Topic Name : Measurement Of Large Distances |
|
Introduction
Large distances can be measured by using the parallax method
Pre-Requisites:
Introduction to measurement of length
Activity:
Try gauging the distances between two points by parallax effect.
Real Life Question:
Can we measure the distance between the sun and Pluto using a meter scale?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Parallax | An apparent change in the direction of an object, caused by a change in observational position that provides a new line of sight. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Ordinary object | Observe from difference positions and notice the apparent change in distance. |
Real life uses :
To find large distances.
Places to visit :
US Naval Observatory
Practical examples around us
| Examples | Explainations |
|---|---|
| In the weight balance needle | When viewed from different angles, it shows variations in the needle positions. |
What you learn in Theory:
The formulae involved in calculating the large distances.
What you learn in Practice:
The effect of parallax in day to day life.