Question

Assertion(A) : The centre of curvature is not a part of the mirror. It lies outside its reflecting surface. Reason (R) : The reflecting surface of a spherical mirror forms a part of a sphere. This sphere has a centre. (1 Point) a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) A is false but R is true.​

Answer 1

Assertion(A) : The centre of curvature is not a part of the mirror. It lies outside its reflecting surface.

Reason (R) : The reflecting surface of a spherical mirror forms a part of a sphere. This sphere has a centre.

Both A and R are correct and Reason is the correct explaination of assertion.

But why?

• First of all, the centre of curvature lies on the principal Axis outside the mirror. So, it does not lie on the reflecting surface of the mirror.

• Again, the mirror has been obtained by cutting a part of a sphere. Hence, the reflecting surface is actually a part of that sphere.

• That sphere has a centre and this centre corresponds to the centre of curvature of the mirror.

$\star$ Please Refer to the Diagram.

Answer 2

Answer:

both A and R are correct and reason is the correct explanation of assertion