Notifications
Clear all
Light Reflection and Refraction
1
Posts
2
Users
0
Likes
483
Views
0
19/08/2021 7:36 pm
Topic starter
When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed is real, inverted and same size as the object.
(a) What is the focal length of lens A?
(b) What is the focal length of lens B?
(c) What is the nature of lens A?
(d) What is the nature of lens B?
1 Answer
0
19/08/2021 7:37 pm
(a) The object is placed at focus, so f = 10 cm.
(b) the object is placed at a distance twice the focal length, so f = 5 cm.
(c) Convex lens (since image is real).
(d) Convex lens (since image is real).