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, how does the angle of incidence compare to the angle of refraction?

• They are equal
• The angle of incidence is greater
• The angle of incidence is smaller
• They are unrelated

Which of the following statements is true regarding the frequency of light during refraction?

• It increases
• It decreases
• It remains the same
• It varies with the medium

What is the refractive index of a medium?

• The speed of light in a vacuum divided by the speed of light in the medium
• The speed of light in the medium divided by the speed of light in air
• The angle of incidence divided by the angle of refraction
• The wavelength of light in air divided by the wavelength in the medium

If the angle of incidence is 30 degrees and the angle of refraction is 20 degrees, what can be inferred about the mediums involved?

• Both mediums are rare
• The first medium is denser than the second
• The second medium is denser than the first
• Both mediums are the same

Which of the following factors does NOT affect the refractive index of a medium?

• Density of the medium
• Color (frequency) of light
• Temperature of the medium
• Speed of light in air

What visual effect occurs when an object is placed in water?

• It appears lower than its actual position
• It appears higher than its actual position
• It appears to disappear
• It appears to change color

When a pencil is placed in water, what phenomenon causes it to appear broken?

• Reflection
• Diffraction
• Refraction
• Dispersion

How does the wavelength of light change when it moves from a rarer medium to a denser medium?

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

If a coin is invisible in an empty cup, what happens when the cup is filled with water?

• It becomes invisible again
• It becomes visible
• It sinks
• It floats