Human Eye and Light Quiz

The clear, protective outer layer of the eye that helps focus light.

The colored part of the eye that controls the size of the pupil.

The opening in the iris that allows light into the eye. It adjusts in size to regulate light.

The transparent, flexible structure that focuses light onto the retina.

The light-sensitive layer at the back of the eye that converts light into electrical signals.

The process by which the eye adjusts its focal length to see objects at different distances.

The closest distance at which an object can be seen clearly without strain.

The farthest distance at which an object can be seen clearly.

The splitting of white light into its component colors, like red, orange, yellow, green, blue, indigo, and violet, when it passes through a medium like a prism. This occurs because each color bends at a different angle due to its unique wavelength.

The bending of light as it passes from one medium to another (like air to water). The amount of bending depends on the angle of incidence and the refractive indices of the two mediums.

The phenomenon where light scatters off particles in a colloid, making the beam visible. Examples include dust particles in sunlight or milk mixed with water.

The reason why the sky appears blue during the day. This happens because the molecules in the atmosphere scatter blue light more effectively than other colors.

The apparent change in the position of a star due to the bending of starlight as it passes through the Earth's atmosphere. The star appears higher than its actual position.

The phenomenon that makes stars appear to twinkle. It is caused by the rapid changes in the direction of starlight as it passes through different layers of the Earth's atmosphere.

The refraction of sunlight by tiny water droplets in the atmosphere, creating a spectrum of colors. The rainbow is always formed opposite to the sun.

The bending of light as it passes through the cornea, the outer layer of the eye. This is the primary refractive element in the eye.

The transparent, protective outer layer of the eye that helps focus light.

The colored part of the eye that controls the size of the pupil, regulating the amount of light entering the eye.

The opening in the iris that allows light into the eye. It expands in dim light and contracts in bright light.

The transparent, flexible structure behind the pupil that focuses light onto the retina. It changes shape to adjust focus for near and far objects.

The light-sensitive layer at the back of the eye that converts light into electrical signals that are sent to the brain for processing and interpretation.

The ability of the eye to adjust its focal length by changing the shape of the lens, allowing us to see objects at different distances.

The minimum distance at which objects can be seen clearly without strain, typically around 25 cm.

A clouding of the crystalline lens of the eye, causing blurred vision. It can be corrected with surgery.

The splitting of white light into its component colours (red, orange, yellow, green, blue, indigo, violet) when it passes through a medium, like a prism. Each colour bends at a different angle due to its unique wavelength.

The bending of light as it travels from one medium to another (e.g., air to water). The amount of bending depends on the angle of incidence and the refractive indices of the two mediums.

The scattering of light by tiny particles in a colloid, making the beam visible. Examples include dust particles in sunlight or milk mixed with water. Smaller particles scatter shorter wavelengths (blue light) more effectively.

The reason why the sky appears blue during the day. It's because molecules in the atmosphere scatter blue light more effectively than other colors. At noon, the sun appears white because all colours are scattered.

The apparent change in the position of a star due to the bending of starlight as it passes through the Earth's atmosphere. The star appears higher than its actual position.

The phenomenon that makes stars appear to twinkle. It's caused by the rapid changes in the direction of starlight as it passes through different layers of the Earth's atmosphere.

The refraction (bending) of sunlight by tiny water droplets in the atmosphere, creating a spectrum of colors (a rainbow). Rainbows are always formed opposite to the sun.

The bending of light as it enters the eye through the cornea (outer layer of the eye). This is the primary refractive element in the eye, focusing light onto the retina.