Physics 8 - Review on Light as a Wave

What type of wave is light?

• Longitudinal

• Mechanical

• Transverse

• Sound

What happens to the wavelength of light as it enters a denser medium?

• It increases

• It decreases

• It stays the same

• It disappears

According to the law of reflection, the angle of incidence is equal to the angle of __________.

• Refraction

• Diffraction

• Reflection

• Dispersion

If a light ray strikes a mirror at a 30° angle to the normal, at what angle will it reflect?

• 15°

• 30°

• 45°

• 60°

What is refraction?

• The bending of light as it passes from one medium to another

• The bouncing back of light from a surface

• The spreading out of light waves

• The absorption of light by a material

When light passes from air into water, it __________.

• Speeds up and bends away from the normal

• Slows down and bends toward the normal

• Speeds up and bends toward the normal

• Slows down and bends away from the normal

What is the name of the line perpendicular to the surface at the point where the light ray enters a new medium?

• Incident line

• Normal line

• Refracted line

• Reflected line

A light ray travels from water into air. How does it bend?

• It bends toward the normal

• It bends away from the normal

• It does not bend

• It bends parallel to the normal

What is the phenomenon where a light ray changes direction due to a change in speed when passing through different mediums?

• Reflection

• Refraction

• Diffraction

• Dispersion

What is total internal reflection?

• The complete reflection of a light ray within a medium when it hits the boundary at an angle greater than the critical angle

• The partial reflection and refraction of light

• The bending of light as it passes into a denser medium

• The scattering of light in all directions