Question 1:
Figure 6.35 shows an image seen through a convex lens with focal length of 10 cm.
1. What are the characteristics of the image?
2. Draw a ray diagram to show how the image in the figure is formed.
3. Suggest a suitable position to place the object to produce an inverted image.
Answer:
(a)
Characteristics of the image:
– upright
– magnified
– virtual
(b)
Focal length, f = 10 cm,
u < f
Figure 6.35 shows an image seen through a convex lens with focal length of 10 cm.
1. What are the characteristics of the image?
2. Draw a ray diagram to show how the image in the figure is formed.
3. Suggest a suitable position to place the object to produce an inverted image.
Answer:
(a)
Characteristics of the image:
– upright
– magnified
– virtual
(b)
Focal length, f = 10 cm,
u < f
Image formed is virtual, upright and magnified.
(c)
Object O between F and 2F ( f < u < 2f )
Focal length, f = 10 cm
Therefore, object to be placed between F and 2F to produce an inverted image.