Question

An object is placed 15 cm in front of a lens ‘A’ and it gives real, inverted, magnified image and formed at large distance. Lens ‘A’ is replaced by Lens ‘B’ and a real, inverted image of the same size as of object is formed. Which of the following is true?

1. Both the lenses are convex and have focal length of 15 cm
2. Both the lenses are convex, lens A has a focal length of 15 cm and lens B has a focal length of 30 cm
3. Both the lenses are convex, lens A has a focal length of 15 cm and lens B has a focal length of 7.5 cm
4. Both the lenses are convex but their focal lengths cannot be determined from the given information

Answer 1

Answer:

2

Explanation:

Both the lenses are convex, lens A has a focal length of 15 cm and lens B has a focal length of 30 cm