Understanding Light Refraction

What is refraction of light?

• Refraction of light is the absorption of light by a medium.

• Refraction of light is the reflection of light off a surface.

• Refraction of light is the scattering of light in all directions.

• Refraction of light is the bending of light as it passes from one medium to another.

Define a lens and its function.

• A lens is used to measure temperature.

• A lens is a device that stores data.

• A lens is an optical device that focuses or disperses light.

• A lens is a type of camera.

What are the two main types of lenses?

• Aspheric lenses and cylindrical lenses

• Convex lenses and concave lenses

• Plano-convex lenses and plano-concave lenses

• Biconvex lenses and biconcave lenses

Explain the difference between convex and concave lenses.

• Convex lenses are thicker at the edges; concave lenses are thinner in the middle.

• Both convex and concave lenses converge light.

• Convex lenses diverge light; concave lenses converge light.

• Convex lenses converge light; concave lenses diverge light.

What is the focal point of a lens?

• The focal point of a lens is the point where light rays converge or appear to diverge.

• The focal point is the center of the lens.

• The focal point is where light rays are absorbed.

• The focal point is the edge of the lens.

How does a convex lens affect parallel rays of light?

• A convex lens reflects parallel rays of light away from each other.

• A convex lens scatters parallel rays of light in all directions.

• A convex lens has no effect on parallel rays of light.

• A convex lens converges parallel rays of light to a focal point.

List one application of convex lenses in daily life.

• Projector lens

• Camera lens

• Magnifying glass

• Eyeglasses

What is the formula for calculating the focal length of a lens?

• f = vu / (v + u)

• f = 2 / (1/v + 1/u)

• f = v + u

• f = 1 / (1/v - 1/u)

Describe how a concave lens diverges light rays.

• A concave lens has no effect on the path of light rays.

• A concave lens reflects light rays back in the direction they came from.

• A concave lens diverges light rays by causing them to spread out as they pass through, making them appear to originate from a virtual focal point.

• A concave lens converges light rays to a single point.

What is the significance of the refractive index?

• The refractive index indicates how light interacts with materials, influencing optical behavior and design.

• The refractive index measures the temperature of a material.

• The refractive index is used to calculate the weight of an object.

• The refractive index determines the color of light emitted by a source.