Exploring Light and Vision

What is the law of reflection?

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

• The angle of incidence equals the angle of reflection.

• The angle of reflection is twice the angle of incidence.

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

What is Snell's Law used for?

• To determine the color of light based on its wavelength.

• To measure the intensity of light in a vacuum.

• To calculate the speed of sound in different materials.

• Snell's Law is used to determine the angle of refraction of light as it passes between different media.

Define the critical angle in optics.

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

• The critical angle is the angle at which light enters a medium from air.

• The critical angle is the angle of incidence at which light is completely reflected within a medium, occurring at the boundary between two media.

• The critical angle is the maximum angle of refraction in a medium.

What occurs during total internal reflection?

• Light is absorbed by the denser medium.

• Light bends away from the denser medium.

• Light is completely reflected back into the denser medium.

• Light passes into the less dense medium.

Which type of lens is thicker in the middle?

• Biconcave lens

• Convex lens

• Concave lens

• Flat lens

What is the focal point of a lens?

• The focal point is the point where light rays are always parallel.

• The focal point is the center of the lens.

• The focal point is where light rays are completely absorbed.

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

How do convex lenses affect light rays?

• Convex lenses converge light rays towards a focal point.

• Convex lenses scatter light rays in all directions.

• Convex lenses absorb light rays completely.

• Convex lenses reflect light rays away from each other.

What is the purpose of a concave lens?

• The purpose of a concave lens is to diverge light rays and correct vision, particularly for nearsightedness.

• To magnify objects for better visibility.

• To filter colors in optical devices.

• To converge light rays and correct farsightedness.

What type of mirror is used in a rearview mirror?

• Convex mirror

• Flat mirror

• Concave mirror

• Parabolic mirror

How does a plane mirror reflect light?

• A plane mirror reflects light by following the law of reflection, where the angle of incidence equals the angle of reflection.

• A plane mirror reflects light only in one direction without following any laws.

• A plane mirror reflects light by bending it at a 90-degree angle.

• A plane mirror absorbs all light without reflection.