Page 11 - Curiosity_June_2020_FB

ACTIVITY-4
Aim:
Calculating the distance between the Earth and the Sun?
Apparatus/ Materials Required:
Ball mirror, ruler, and pencil.
Procedure:
1. Project the image of the Sun with help of a ball mirror on a wall as, shown in figure 1.
2. Keep the distance between the ball mirror and
wall approximately 30 meters.
3. When you get the projected image of the Sun mark both ends of the Sun with the help of a pencil as shown in figure 4.
4. With the help of a ruler, measure the diameter of Sun’s image as, shown in figure 4.
5. Measure the distance between ball mirror and projected image of the Sun with the help of a ruler as shown in figure 5.
OBSERVATION TABLE:
Object
Diameter
Actual diameter of the Sun (Known Value)
D = 13,92,000 km (approx.)
Distance between the ball mirror and the projected image of the Sun
L=
Diameter of the Sun’s Image
S=
Calculation for finding the distance between the earth and the Sun:
Distance between the Earth and the Sun = D × L S
Aim:
Observing the nature during the ASE
Procedure:
To perform this activity, you need to go out in the nature like nearby parks, the garden in your house etc. Observe the natural surrounding minutely and try to answer the following questions:
1. Plant Behaviour: Did you find any plant which behaves differently during the eclipse period? If yes, note down your observations? (Hint: Try
to look at the leaves and flowers of a tree those require sunlight.)
2. Animal Behaviour: Did you find any animal
Note: The above activity can be performed from any location of India during the daytime.
By the time this issue of Curiosity reaches you, only a few days will
be left for ASE. But you still have enough time to make all the apparatus or arrangements ready to perform
the activities mentioned here. Don’t forget to send us the observations and photographs of the experiment at curiosity@vigyanprasar.gov.in and get the chance to win exciting prizes.
ACTIVITY-5
which behaves strangely during the eclipse? If yes, note down the name of the animal and changes in their behaviour you observed.
3. Bird Behaviour: Did you find any bird which behaves differently during the eclipse? If yes, write the name of bird and the changes you observed.
4. Observing sea waves: The observers residing in the coastal regions of India can perform this activity. Start observing the sea waves and water level of the sea a day before the eclipse. Keep track of all the changes you observed in the sea waves and sea level after every one hour.
The author is Technical assistant at Vigyan Prasar.
June 2020
11