Reflection and refraction

What is the name of a line drawn at 90° to the surface of a material?

• Boundary

• Incident

• Normal

Which term is used to refer to an incoming ray?

• Refracted

• Incident

• Normal

What is the law of reflection?

• Angle of incidence = angle of reflection

• Angle of incidence < angle of reflection

• Angle of incidence > angle of reflection

What angle would a light ray reflect at, if it hits a mirror at 24° to the normal?

• 0° (along the normal)

• 66°

• 24°

Which wave type can be refracted?

• Transverse waves

• Longitudinal waves

• All waves

What word describes a change in wave direction passing through an interface between media?

• Absorption

• Refraction

• Reflection

What happens to a water wave when it travels from shallow water into deep water?

• It changes direction towards the normal

• It slows down

• It changes direction away from the normal

Which word is used to describe wave energy passing through a material?

• Transmitted

• Absorbed

• Reflected

When a wave passes into a slower medium, what happens to its wavelength?

• Reduces

• Increases

• No change

Which light wavelengths pass better through glass?

• Longer wavelengths like infrared

• Shorter wavelengths like ultraviolet

• All wavelengths pass well