Question

Read the following passage and answer the
questions that follow:
You had a convex lens of focal length 5m, and two
lenses A and B of unknown focal lengths. You
observed that if you placed lens A in contact with the
convex lens, the combination acted like a plane glass
slab. On the other hand, if lens B was kept in contact
with the convex lens, the combination acted like a
convex lens of focal length 10 cm.

​

Answer 1

Answer:

[1]

b] 5m

[2]

d] -20m

this is your answer

Answer 2

Answer:

1.

(-5)

2.

(-10)

it is the correct answer

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