Light Refraction Quiz

What is the difference between reflection and refraction?

• Reflection is the bending of light, while refraction is the bouncing off a surface.

• Reflection involves light bouncing off a surface, while refraction involves light bending when it passes through different mediums.

• Reflection occurs when light passes through different mediums, while refraction involves light bending when it passes through a surface.

• Reflection and refraction are the same phenomenon with different names.

State Snell's Law in relation to the angles of incidence and refraction.

• n1 * cos(theta1) = n2 * cos(theta2)

• n1 + sin(theta1) = n2 + sin(theta2)

• n1 / sin(theta1) = n2 / sin(theta2)

• n1 * sin(theta1) = n2 * sin(theta2)

Define the index of refraction of a material.

• The index of refraction is a unit of temperature

• The index of refraction is a measure of the material's weight

• The index of refraction is a measure of the material's electrical conductivity

• The index of refraction of a material is a dimensionless number that describes how light propagates through that material compared to the speed of light in a vacuum.

Explain how the speed of light changes when it enters a medium with a higher index of refraction.

• The speed of light becomes infinite.

• The speed of light remains constant.

• The speed of light increases.

• The speed of light decreases.

What happens to the wavelength of light when it enters a medium with a higher index of refraction?

• The wavelength becomes invisible.

• The wavelength decreases.

• The wavelength remains the same.

• The wavelength increases.

How does the angle of refraction change when light travels from a less dense medium to a more dense medium?

• The angle of refraction increases.

• The angle of refraction remains the same.

• The angle of refraction becomes parallel to the surface.

• The angle of refraction decreases.

Calculate the angle of refraction when light enters water from air, given the angle of incidence is 30 degrees and the index of refraction of water is 1.33.

• 32.6 degrees

• 25.3 degrees

• 18.7 degrees

• 21.8 degrees

A light ray travels from air into glass with an index of refraction of 1.5. If the angle of incidence is 40 degrees, calculate the angle of refraction.

• 30.12 degrees

• 35.76 degrees

• 25.84 degrees

• 42.93 degrees

Explain why a pencil appears bent when partially submerged in water.

• Diffraction of light

• Refraction of light

• Dispersion of light

• Reflection of light

What is total internal reflection and under what conditions does it occur?

• Total internal reflection occurs when the angle of incidence is greater than the critical angle, which is determined by the refractive indices of the two materials involved.

• Total internal reflection occurs when the refractive indices are the same

• Total internal reflection occurs when the angle of incidence is less than the critical angle

• Total internal reflection occurs when the light passes through a vacuum