Reflection and Refraction Concepts in IB Physics

What is the angle of incidence equal to in the case of reflection?

• The angle of transmission

• The angle of reflection

• The angle of refraction

• The angle of dispersion

From where are the angles of incidence and reflection measured?

• From the observer

• From the light source

• From the normal

• From the surface

What happens to light when it undergoes refraction?

• It changes speed

• It changes color

• It changes frequency

• It changes direction only

What does the index of refraction (n) represent?

• The frequency of light

• The optical density of a medium

• The speed of light in a vacuum

• The wavelength of light

According to Snell's Law, what is the relationship between the angles and the indices of refraction?

• n1 * sin(θ1) = n2 * sin(θ2)

• n1 / sin(θ1) = n2 / sin(θ2)

• n1 + sin(θ1) = n2 + sin(θ2)

• n1 - sin(θ1) = n2 - sin(θ2)

What remains constant when light refracts from one medium to another?

• Frequency

• Speed

• Wavelength

• Angle

What is the critical angle?

• The angle at which light is totally internally reflected

• The angle at which light is completely absorbed

• The angle at which light passes straight through

• The angle at which light is scattered

What happens to the angle of refraction when light moves from a medium with a higher index of refraction to a lower one?

• It remains the same

• It becomes larger

• It becomes zero

• It becomes smaller

In the example problem, what happens to the wavelength of light as it moves from water to air?

• It remains the same

• It becomes zero

• It decreases

• It increases

What is the relationship between the indices of refraction and the wavelength of light in different media?

• They are inversely proportional

• They are unrelated

• They are directly proportional

• They are equal