Grade 8 Refraction of Light Quiz

What is the law of refraction?

• The law of refraction states that light always bends towards the normal

• The law of refraction states that the speed of light is constant in different mediums

• The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant

• The law of refraction states that the angle of refraction is always greater than the angle of incidence

State the relationship between the angle of incidence and the angle of refraction.

• They are related by Snell's Law

• The angle of incidence is always greater than the angle of refraction

• The angle of refraction is always greater than the angle of incidence

• They are unrelated

Explain the concept of refractive index.

• Refractive index is a measure of how much light is bent, or refracted, when it enters a material.

• Refractive index is a measure of the color of light passing through a material.

• Refractive index is a measure of the amount of light absorbed by a material.

• Refractive index is a measure of the speed of light in a material.

What is the normal line in the context of refraction?

• An imaginary line that is perpendicular to the surface of the medium at the point of incidence

• A line that is perpendicular to the surface of the medium at a point away from the point of incidence

• A line that is at a 45-degree angle to the surface of the medium at the point of incidence

• A line that is parallel to the surface of the medium at the point of incidence

Describe the phenomenon of total internal reflection.

• Total internal reflection is the phenomenon where a light ray is partially refracted and partially reflected at the interface of two mediums.

• Total internal reflection is the phenomenon where a light ray traveling from a denser medium to a rarer medium strikes the interface at an angle greater than the critical angle, causing the light to be completely reflected back into the denser medium.

• Total internal reflection is the phenomenon where a light ray passes through a medium without any change in direction.

• Total internal reflection occurs when a light ray passes from a rarer medium to a denser medium at an angle less than the critical angle.

How is refraction used in the design of eyeglasses?

• To make the eyeglasses more fashionable

• To block out harmful UV rays

• To create colorful patterns on the lenses

• To correct vision problems by bending light to focus properly on the retina.

Explain the working principle of a prism.

• A prism works by emitting light.

• A prism works by refracting light.

• A prism works by absorbing light.

• A prism works by reflecting light.

How is refraction used in the formation of a rainbow?

• Refraction causes the formation of clouds in the sky

• Refraction causes the dispersion of sunlight into its component colors, forming a rainbow.

• Refraction results in the formation of hailstones

• Refraction leads to the cooling of the atmosphere

Describe the role of refraction in the functioning of a camera.

• Refraction has no role in the functioning of a camera

• Refraction causes the light to scatter in different directions

• Refraction helps to focus the light onto the image sensor or film.

• Refraction creates a blurry image in the camera

What is the application of refraction in the field of fiber optics?

• Scattering of light signals

• Transmission of light signals

• Absorption of light signals

• Reflection of light signals