Refraction and Reflection Quiz

What happens to the speed of a wave when it enters a more optically dense medium?

• It increases
• It decreases
• It remains the same
• It fluctuates

When light is reflected off a plane mirror, which of the following characteristics is NOT true about the image formed?

• It is virtual
• It is upright
• It is larger than the object
• It is the same distance from the mirror as the object

According to Snell's law, what is the relationship between the angle of incidence and the angle of refraction when light enters a less optically dense medium?

• Angle of incidence is less than angle of refraction
• Angle of incidence is equal to angle of refraction
• Angle of incidence is greater than angle of refraction
• Angle of incidence is unrelated to angle of refraction

What is the refractive index (n) of a medium?

• The speed of light in a medium divided by the speed of sound
• The ratio of the speed of light in a vacuum to the speed of light in the medium
• The angle of incidence divided by the angle of refraction
• The wavelength of light in a medium divided by its frequency

What occurs during total internal reflection?

• Light passes through the medium
• Light bends towards the normal
• Light reflects back into the medium
• Light is absorbed by the medium

Which of the following statements about the critical angle is true?

• It is the angle at which light enters a more optically dense medium
• It is the angle at which total internal reflection occurs
• It is always 90 degrees
• It is the same for all materials

If a wave enters a less optically dense medium, what happens to its wavelength?

• It decreases
• It increases
• It remains the same
• It becomes zero

Which of the following best describes the image formed by a plane mirror?

• Inverted and smaller
• Upright and larger
• Upright and same size
• Inverted and same size

What happens to the frequency of a wave when it enters a new medium?

• It increases
• It decreases
• It remains the same
• It fluctuates

When light travels from a more optically dense medium to a less optically dense medium, which way does it bend?

• Towards the normal
• Away from the normal
• It does not bend
• It bends randomly