Daily Olympiad: Science - Human Eye Colourful World [20260511]

Solution

Correct: C

The cornea is responsible for the majority (about 2/3) of the eye’s total refractive power due to the significant difference in refractive indices between air and corneal tissue. The lens provides the remaining 1/3 for focusing.

Solution

Correct: B

To focus on a near object, the ciliary muscles contract, causing the lens to become more rounded (increases curvature), allowing the focal length to shorten. This is called accommodation.

Solution

Correct: B

Myopia (nearsightedness) occurs when the eye cannot focus on distant objects. A concave lens diverges incoming light rays, allowing the eye's lens to focus the image correctly on the retina.

Solution

Correct: B

Rayleigh scattering states that shorter wavelength lights (like blue) are scattered more than longer wavelengths. Since the human eye is more sensitive to blue than violet, the sky appears blue.