Page 159 - NCERT Science Class 10 English Medium

(ii) A ray of light passing
through a principal
focus, after refraction
from a convex lens, will
emerge parallel to the
principal axis. This is
shown in Fig. 9.14 (a). A
(a) (b) ray of light appearing to
meet at the principal
Figure 9.149.14
Figure 9.14
Figure 9.14
Figure
Figure 9.14 focus of a concave lens,
after refraction, will
emerge parallel to the
principal axis. This is
shown in Fig.9.14 (b).
(iii) A ray of light passing
through the optical
centre of a lens will
emerge without any
deviation. This is
(a) (b) illustrated in Fig.9.15(a)
Figure 9.159.15
Figure
Figure 9.15 and Fig.9.15 (b).
Figure
Figure 9.15
9.15
The ray diagrams for the image formation in a convex lens for a few
positions of the object are shown in Fig. 9.16. The ray diagrams
representing the image formation in a concave lens for various positions
of the object are shown in Fig. 9.17.

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