Question

Q. 1 Single
Two parallel rays incident on the
combination of two lenses A and B
placed in close contact as shown below.
Then choose the correct option among
the following
AB
a. Both A and B can be concave lens
b. Both A and B can be convex lens
c. A can be convex and B can be
concave but power of B must be greater
than power of A
d. A can be concave and B can be​

Answer 1

Answer:

option A both A and b can be concave lens

because the combination of to lens is placed at 1 ray so that it is con cave lens

Explanation:

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Answer 2

Answer:

option C is Correct

Explanation:

because, the rays are diverging so, B can Be concave but for A two conditions arises here,

* A can be convex too.

* But B concave and power of B greater than A.

so ultimately rays get divergent.

A diverging lense is said to have a negative focal length..

because of the different shape of the double concave lens, these incident rays are not converged to a point upon refraction through the lens.

Rather, these incident rays diverge upon refracting through the lens.

For this reason, a double concave lens can never produce a real image. Double concave lenses produce images that are virtual.