Light Quiz

What is light?

• Light is a type of sound.

• Light is a form of matter.

• Light is a type of energy.

• Light is a form of electromagnetic radiation.

What is the speed of light in a vacuum?

• 1,000,000,000 meters per second

• 3,000,000 meters per second

• 299,792,458 meters per second

• 100,000 meters per second

What is the primary source of light on Earth?

• Sun

• Fire

• Stars

• Moon

What is the electromagnetic spectrum?

• The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.

• The electromagnetic spectrum is a measurement of temperature.

• The electromagnetic spectrum is a form of currency.

• The electromagnetic spectrum is a type of musical instrument.

What is the difference between reflection and refraction of light?

• Reflection and refraction are the same thing.

• Reflection is the bending of light when it passes through a medium of different density, while refraction is the absorption of light by a surface.

• Reflection is the bouncing back of light when it strikes a surface, while refraction is the bending of light when it passes through a medium of different density.

• Reflection is the bending of light when it passes through a medium of different density, while refraction is the bouncing back of light when it strikes a surface.

What is the law of reflection?

• The law of reflection states that the angle of incidence has no relation to the angle of reflection.

• The law of reflection states that the angle of incidence is less than the angle of reflection.

• The law of reflection states that the angle of incidence is equal to the angle of reflection.

• The law of reflection states that the angle of incidence is greater than the angle of reflection.

What is the critical angle in optics?

• The critical angle in optics is the angle of incidence that produces an angle of refraction of 45 degrees.

• The critical angle in optics is the angle of incidence that produces an angle of refraction of 180 degrees.

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

• The critical angle in optics is the angle of incidence that produces no angle of refraction.

What is total internal reflection?

• Total internal reflection is the reflection of a light ray back into a medium with the same density when it is incident at an angle greater than the critical angle.

• Total internal reflection is the reflection of a light ray back into a denser medium when it is incident at an angle greater than the critical angle.

• Total internal reflection is the reflection of a light ray back into a less dense medium when it is incident at an angle greater than the critical angle.

• Total internal reflection is the reflection of a light ray back into a different medium when it is incident at an angle less than the critical angle.

What is the difference between transparent, translucent, and opaque objects?

• Transparent objects absorb all light

• The difference between transparent, translucent, and opaque objects is that transparent objects allow light to pass through them completely, translucent objects allow some light to pass through but not completely, and opaque objects do not allow any light to pass through them.

• Opaque objects allow some light to pass through

• Translucent objects allow light to pass through completely

What is the function of a lens in optics?

• The function of a lens in optics is to generate heat and produce colors.

• The function of a lens in optics is to reflect light and create shadows.

• The function of a lens in optics is to refract light and focus or diverge light rays.

• The function of a lens in optics is to absorb light and prevent it from passing through.