Page 266 - text book form physics kssm 2020

Procedure:
1. Set up the apparatus as shown in Figure 6.36.
White
Cardboard with screen
triangular Convex
shaped hole lens

Bulb
Object v

u
Wooden Note: Th is experiment
block Metre rule should be carried out in a
dark room.
Figure 6.36
2. Switch on the bulb and start the experiment with object
distance, u = 15.0 cm. Adjust the position of the screen Video demonstration of
until a sharp image is formed. non-parallax method
3. Measure the image distance, v and record the reading in
Table 6.9.
4. Repeat steps 2 and 3 with object distance, u = 20.0 cm,
25.0 cm, 30.0 cm and 35.0 cm. Record the readings in http://bt.sasbadi.com/p4260
Table 6.9.

Results:

Table 6.9
1 1
u / cm v / cm / cm −1 / cm −1
u v
15.0
20.0
25.0
30.0
35.0
Analysis of data:
1
1
1. Plot a graph of against .
v u
2. Determine the gradient of the graph, m.
3. Determine the intercepts for both axes.
4. Using lens formula and the graph plotted, determine the focal length of the lens in
this experiment.

Conclusion:
What conclusion can be made from this experiment?
Prepare a complete report for this experiment.
Discussion:
State a precaution to be taken to increase the accuracy of the results of this experiment.

260 6.4.1
260
6.4.1