19. Focal length of convex lens
is 10cm and concave lens is 5
cm. What is the combined
focal length of the two lenses
when kept in contact
Answers
Answered by
1
Answer:
- For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for example a convex lens), the focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot.
Answered by
0
Answer:
The focal length of the combination of the lenses = 0.125 m = 12.5 cm.
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