Exploring the Nature of Light

What is the law of reflection?

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

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

• The angle of incidence equals the angle of reflection.

• The angle of reflection is always zero degrees.

Define refraction and give an example.

• An example of refraction is a straw appearing bent when placed in a glass of water.

• A pencil appearing to be broken when placed in a glass of water.

• A rainbow appearing in the sky after rain.

• Light traveling in a straight line without any change in direction.

How does the angle of incidence relate to the angle of reflection?

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

• The angle of incidence and reflection are unrelated.

• The angle of incidence equals the angle of reflection.

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

What happens to light when it passes from air into water?

• Light speeds up and changes color when it enters water.

• Light bends and slows down when it passes from air into water.

• Light disappears completely when it hits the water surface.

• Light passes straight through without any change.

Explain total internal reflection.

• Total internal reflection is the bending of light as it passes from one medium to another.

• Total internal reflection only happens in gases, not in liquids or solids.

• Total internal reflection occurs when light passes through a medium without any reflection.

• Total internal reflection is the phenomenon where light is completely reflected at the boundary of two media when the angle of incidence exceeds the critical angle.

What is the critical angle in the context of refraction?

• The critical angle is the angle of reflection that occurs when light hits a surface.

• The critical angle is the angle of incidence at which light is refracted at 90 degrees to the normal.

• The critical angle is the angle at which light travels in a straight line without bending.

• The critical angle is the angle of incidence at which light is completely absorbed.

Describe how a prism affects light.

• A prism absorbs all light, making it disappear.

• A prism reflects light without changing its direction.

• A prism refracts light, bending it and separating it into a spectrum of colors.

• A prism creates light by generating energy from colors.

What is the difference between regular and diffuse reflection?

• Regular reflection is only seen in mirrors, whereas diffuse reflection is seen in all materials.

• Regular reflection occurs only on smooth surfaces, while diffuse reflection happens on rough surfaces.

• Regular reflection produces clear images, while diffuse reflection scatters light and does not produce clear images.

• Diffuse reflection creates clear images, while regular reflection scatters light.

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

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

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

• The speed of light remains constant regardless of the medium.

• The speed of light fluctuates randomly in a denser medium.

What practical applications utilize the principles of reflection and refraction?

• Solar panels

• Lenses, mirrors, fiber optics, and cameras.

• Electric motors

• Batteries