Question

Assertion (A): In bright light, a speedy reflex action makes the pupil smaller and reduces the light entering the eye.

Reason (R): The contraction of pupil of our eye automatically in the presence of dim light is example of cerebral reflex.

Options

• Both A and R are true and R is correct explanation of the assertion.

• Both A and R are true but R is not the correct explanation of the assertion.

• A is true but R is false.

• A is false but R is true.

Answer 1

A is true but R is false.

Explanation:

In bright light, the pupil contracts (becomes smaller), reducing the amount of light entering the eye. Therefore, Assertion (A) is true.

In dim light, the pupil dilates (becomes larger) to allow more light to enter the eye. Hence, the statement that the pupil contracts in dim light is false. Therefore, Reason (R) is false.

Hence, A is true but R is false.