TEST OF PRACTICAL KNOWLEDGE QUESTION You are provided with an illuminated object, converging lens, screen, metre rule, and other necessary materials. Measur...

TEST OF PRACTICAL KNOWLEDGE QUESTION

You are provided with an illuminated object, converging lens, screen, metre rule, and other necessary materials.

• Measure and record the size a\(_{o}\) of the illuminated object.
• Place the object O and the screen S on Opposite sides of the converging lens L.
• Set the distance between the object and the lens U = 30cm.
• Adjust the screen until a sharp image of the illuminated object is obtained on the screen.
•  Measure and record the size a of the image.
• Evaluate m = \(\frac{a}{a_{0}}\), and m\(^{-1}\)
• Repeat the procedure for four other values of U=35cm, 40cm, 45cm and 50cm respectively.
• Tabulate your readings.
• Plot a graph with m\(^{-1}\) on the vertical axis and U on the horizontal axis.
• Determine the slope, s, of the graph and intercept, C, on the vertical axis.
• Determine the value of U for which m\(^{-1}\)=0.
• State two precautions taken to obtain accurate results.

(b)i. Using your graph, determine the value of m for which U= 37cm.

ii. Sketch a diagram to illustrate how a converging lens may be used to produce a real diminished image of an object.