Quiz on Refraction of Light and Electromagnetic Spectrum

What happens to the speed of light when it travels from a rarer medium to a denser medium?

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

When light passes from a denser medium to a rarer medium, what happens to the angle of refraction compared to the angle of incidence?

• It is smaller
• It is larger
• It is equal
• It is unpredictable

Which of the following statements about the refractive index is true?

• It has units of measurement
• It is the ratio of the speed of light in a medium to the speed of light in air
• It depends only on the wavelength of light
• It is always greater than 1

What effect does refraction have on the appearance of an object submerged in water?

• It appears lower than its actual position
• It appears higher than its actual position
• It appears unchanged
• It appears distorted

In the context of refraction, what is the critical angle?

• The angle at which light is completely absorbed
• The angle of incidence that results in an angle of refraction of 90 degrees
• The angle at which light travels straight through a medium
• The angle at which light is refracted the most

What is total internal reflection?

• Light reflecting off a surface
• Light bending as it enters a new medium
• Light being completely reflected back into a denser medium when the angle of incidence exceeds the critical angle
• Light scattering in all directions

Which of the following is an application of total internal reflection?

• Mirrors
• Lenses
• Optical fibers
• Prisms

How does the frequency of light change when it passes from one medium to another?

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

What happens to the wavelength of light when it moves from a denser medium to a rarer medium?

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

When conducting an experiment to measure the refractive index using a semicircular block, what should you observe?

• The light ray should not change direction
• The light ray should bend towards the normal
• The light ray should bend away from the normal
• The light ray should disappear