Light waves are first transmitted through the ______ at the front opening called the ______ before shining onto the retina.
Options:
1. cornea; pupil
2. sclera; lens
3. lens; sclera
4. pupil; cornea
Answer (2)
The question is asking about how light waves travel through the eye to reach the retina. To understand this, let's look at the basic structure of the eye and how it processes light.
When light enters the eye, it first passes through the cornea. The cornea is the transparent front layer of the eye that helps focus light. After passing through the cornea, the light continues through the pupil, which is the opening in the center of the iris (the colored part of the eye). The pupil adjusts in size to control the amount of light entering the eye.
Given the options provided:
Cornea; pupil - This is the correct sequence because light first goes through the cornea and then the pupil.
Sclera; lens - The sclera is the white part of the eye and doesn't play a direct role in focusing light.
Lens; sclera - The lens is involved in focusing light, but it's not at the front opening of the eye.
Pupil; cornea - This sequence is incorrect as the cornea comes before the pupil.
Therefore, the correct answer is: 1. Cornea; pupil .
Once light passes through the pupil, it reaches the lens, which further focuses the light onto the retina at the back of the eye. The retina contains cells that detect light and convert it into electrical signals, which are then sent to the brain to create visual images.
Light waves first travel through the cornea, then the pupil, before reaching the retina. The cornea focuses the light, while the pupil adjusts light entry. Therefore, the correct answer is option 1: Cornea; pupil.
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