Experiment No. 5
To determine the height of wire by Sertant-
Object
To determine the height of building by Sextant .
Apparatus Required
Sextant measuring tape , chalk.
Formula Used
Where h1 is the height of building above the
eye level mark d , is the distance between the two points of observation on
ground θ2 is the angular elevation of object at first
or nearest point of observation θ1 is the angular elevation of object at the
second or farthest point of observation .
H = h1 + h2
H is the total height of distant object from the ground h2 is the height of mark from the ground h1 is the height of building a the eye level (mark)
Observation table 1.
Distance between the two points of
observation = d = 1m
|
Left reading θ1 |
Right reading θ1 |
Mean θ1 |
Left reading θ2 |
Right right θ2 |
Mean θ2 |
|
|
|
|
|
|
|
|
29 ansh 40 ‘ |
30 ansh 20’ |
30 ansh |
28 ansh 20’ |
28 ansh 40’ |
28 ansh 30’ |
2. Distance between the two
points of observation = d = 2m
|
Left reading θ1 |
Right right θ1 |
Mean θ1 |
Left reading θ₂ |
Right reading θ₂ |
Mean θ₂ |
|
|
|
|
|
|
|
|
29 ansh 40’ |
30’ 40’ |
30’ |
27’ 40’ |
27’ 20 |
27’ 30’ |
Calculation
Result
The height of the second flour of building is 11.22m.
Precautions
The scale should be vertical.
The enter city of two images should be same.
The height of referernce mark and axis of telescope
should be the same.
Note.
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कृपया ध्यान दीजिये जो एक्सपेरिमेंट न दिख रहा हो वो आप सर्च बॉक्स में सर्च कर लीजिये . जैसे , एक्साप्रिमेंट नंबर.3