Properties and Characteristics of Light

What is the law of reflection?

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence is less than the angle of reflection.

• The angle of incidence is unrelated to the angle of reflection.

• The angle of incidence is greater than the angle of reflection.

Explain the difference between regular and diffuse reflection.

• Regular reflection occurs when light rays are reflected in a random manner, while diffuse reflection occurs when light rays are reflected in a parallel manner.

• Regular reflection occurs when light rays are reflected in a parallel manner, while diffuse reflection occurs when light rays are absorbed by the surface.

• Regular reflection occurs when light rays are reflected in a curved manner, while diffuse reflection occurs when light rays are refracted.

• Regular reflection occurs when light rays are reflected in a parallel manner, while diffuse reflection occurs when light rays are reflected in various directions.

What is the angle of incidence?

• The angle at which a ray of light strikes a surface.

• The angle at which a sound wave strikes a surface.

• The angle at which a car moves on a road.

• The angle at which a plant grows towards the sun.

Define the term 'normal' in the context of reflection of light.

• Imaginary line perpendicular to the surface at the point of incidence

• The angle of reflection is equal to the angle of incidence

• The point where light strikes the surface

• A line that extends from the surface into the air

What is the refractive index of a medium?

• A measure of how much light expands when it enters the medium

• A measure of how much light bends when it enters the medium

• A measure of how much light slows down when it enters the medium

• A measure of how much light speeds up when it enters the medium

Explain the concept of total internal reflection.

• Total internal reflection occurs when a light ray traveling from a denser medium to a less dense medium is reflected back into the denser medium instead of refracting out of it.

• Total internal reflection happens when a light ray travels from a less dense medium to a denser medium and refracts out of it

• Total internal reflection is the process of light passing through a medium and changing its speed

• Total internal reflection occurs when a light ray passes through a medium without any change in direction

What is the difference between convex and concave lenses?

• Convex lenses absorb light, while concave lenses reflect light.

• Convex lenses scatter light, while concave lenses absorb light.

• Convex lenses converge light, while concave lenses diverge light.

• Convex lenses diverge light, while concave lenses converge light.

How does the speed of light change when it enters a different medium?

• The speed of light changes when it enters a different medium.

• The speed of light increases when it enters a different medium.

• The speed of light decreases when it enters a different medium.

• The speed of light remains the same when it enters a different medium.

What is the phenomenon of dispersion of light?

• Combining of light into a single color

• Separation of light into its different colors

• Absorption of light by an object

• Reflection of light off a surface

Explain the concept of critical angle in the context of refraction.

• The critical angle is the angle of refraction that produces an angle of incidence of 90 degrees.

• The critical angle is the angle at which light passes through a medium without any refraction.

• The critical angle is the angle at which light is completely absorbed by a medium.

• The critical angle is the angle of incidence that produces an angle of refraction of 90 degrees.