Page 150 - Physics_Form_2

Physics for Secondary Schools

centre of curvature such that there 8. Locate the point at which the
is a considerable distance to the pole reflected rays intersect and draw an
of the mirror. arrow from the principal axis to the

5. Using the chosen scale, draw an point of intersection. This represents
upright arrow at a point far beyond the image and its location.
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C. The arrow represents an object. 9. Measure the object distance, the
image distance, the object size,
6. Draw a ray diagram from the tip of and the image size. Determine the
the arrow parallel to the principal enlargement of the image using the
axis. This ray will be reflected formula:

through the focal point. image size
7. Draw another ray through the focal magnification= object size
point from the same point on the
object. This ray is reflected parallel Repeat steps 5 to 9 for different
to the principal axis. You may also positions of the object. That is an

choose to draw a ray that strikes at object at the centre of curvature, C,
the pole and is reflected with the an object between C and F, an object
same angle as that of incidence. at F, an object between F and P.

10. Record your results as shown in Table 4.3.

Table 4.3

( u cm ) ( v cm ) h 0 (cm ) h 1 (cm ) Nature of image Magnification

Beyond C
At C
Between F and C

At F
Between F and P

Questions
(a) What are the positions of the images formed for different object positions?
(b) Describe the nature of the images formed. That is, whether the images for various
object positions are real or virtual, upright or inverted.

(c) Are the images for objects at different positions enlarged, the same size as the
object or diminished?

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Student’s Book Form Two

Physics Form 2 Final.indd 144 25/10/2025 10:27