Multiple choice

When a person walking in _______ sunlight enters a dark room, he is not able to see clearly for a little while because the iris is unable to dilate the pupil immediately.

  1. bright

  2. dark

  3. dim light

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When moving from bright sunlight, the pupils are constricted to limit light entry. Upon entering a dark room, the iris needs time to dilate the pupils to allow more light in, causing temporary difficulty in seeing.

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