Exploring the Wonders of Light

What is the nature of light?

• Light is both a wave and a particle.

• Light has no physical properties.

• Light is only a wave.

• Light is solely a particle.

How does light travel?

• Light travels only in straight lines.

• Light travels in waves and particles (photons) at a speed of about 299,792 km/s in a vacuum.

• Light is made up of solid particles that do not move.

• Light travels faster in water than in a vacuum.

What is the speed of light in a vacuum?

• 299,792 kilometers per second

• 299,792,458 meters per second

• 300,000,000 meters per second

• 150,000,000 meters per second

Define reflection of light.

• Reflection of light is the absorption of light by a surface.

• Reflection of light is the scattering of light in different directions.

• Reflection of light is the conversion of light into heat energy.

• Reflection of light is the bouncing back of light rays when they hit a surface.

What is the law of reflection?

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

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

• The angle of incidence equals the angle of reflection.

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

What is the difference between a concave and a convex mirror?

• Concave mirrors diverge light; convex mirrors focus light.

• Concave mirrors are flat; convex mirrors are curved.

• Concave mirrors focus light; convex mirrors diverge light.

• Concave mirrors are used for projection; convex mirrors are used for magnification.

What happens to light when it hits a smooth surface?

• Light is absorbed by a smooth surface.

• Light reflects off a smooth surface.

• Light passes through a smooth surface.

• Light scatters in all directions upon hitting a smooth surface.

Explain the phenomenon of refraction.

• Refraction is the bending of light as it passes between different media due to a change in speed.

• Refraction occurs only in gases and not in liquids or solids.

• Refraction is the absorption of light in a medium.

• Refraction is the reflection of light off a surface.

What is the refractive index?

• The refractive index is the ratio of the speed of light in vacuum to the speed of light in a medium.

• The refractive index is the angle at which light enters a medium.

• The refractive index is the color of light in different mediums.

• The refractive index is the measure of light intensity in a medium.

How does light bend when it passes from air to water?

• Light bends towards the normal when it passes from air to water.

• Light bends upwards when entering water from air.

• Light travels in a straight line without bending in water.

• Light bends away from the normal when it passes from air to water.