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Chapter 9, part 3

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  • What happens to light when it enters a denser medium?
    It slows down and bends towards the normal.
  • What type of image does a plane mirror form?
    Real and larger
    Virtual and same size
    Virtual and blurry
    Upside down and smaller
  • Why does violet bend more than red in a prism?
    Because it slows down more due to higher frequency.
  • Why do swimming pools look shallower than they really are?
    Because of refraction of light at the water surface.
  • What is regular reflection?
    when light reflects evenly off a smooth surface.
  • Which mirror always forms an image smaller than the object?
    Concave mirror
    Plane mirror
    Convex mirror
    Flat glass
  • What are transparent objects?
    objects that let all light pass through.
  • What do we call the splitting of white light into colors?
    Dispersion.
  • What are opaque objects?
    objects that do not let light pass through.
  • What causes a lunar eclipse?
    Earth blocks sunlight from reaching the moon.
  • Which type of mirror reflects light without changing the size of the image?
    Convex mirror
    Plane mirror
    Concave mirror
    Curved mirror
  • What is the name of the ray that strikes the surface?
    Incident ray.
  • What kind of reflection happens with a mirror?
    regular reflection.
  • Which type of mirror is used in car side mirrors for a wider view?
    Plane mirror
    Flat mirror
    Convex mirror
    Concave mirror
  • What is refraction?
    The bending of light when it passes from one medium to another.
  • How does a prism split white light?
    By refracting each color by a different amount.
  • Which mirror may form an image larger than the object when the object is close?
    Transparent mirror
    Concave mirror
    Plane mirror
    Convex mirror
  • Why does the moon appear red during a lunar eclipse?
    Earth's atmosphere bends red light toward it.
  • Why does a transparent object form no shadow?
    it lets all the light through.
  • What causes light to bend during refraction?
    A change in the density of the medium/ the speed of the light changes.
  • What kind of reflection happens on a rough wall?
    irregular reflection.
  • What is apparent depth?
    The depth at which an object appears to be when viewed through a denser medium.
  • What is the position of the moon during a new moon?
    when the moon is between Earth and the Sun.
  • What is irregular reflection?
    when light scatters in many directions from a rough surface.
  • What does waning mean?
    the moon is getting smaller.
  • What causes the phases of the moon?
    the moon’s position relative to Earth and the Sun.
  • What does the law of reflection state?
    angle of incidence is always 90°
    angle of incidence equals angle of reflection
    light always bends
    light disappears
  • What do we call the imaginary line drawn perpendicular to a reflective surface?
    the incident ray
    the reflected ray
    the normal
    the refracted ray
  • Why does a pencil look bent in a glass of water?
    Because of refraction at the water surface.
  • What is the ray called after it bends?
    Refracted ray.
  • What is refraction?
    when light bends as it passes through a different medium.
  • What happens to light when it enters a less dense medium?
    It speeds up and bends away from the normal.
  • What are translucent objects?
    objects that let some light pass through.
  • How do images in a plane mirror appear?
    Not inverted at all
    Blurry and sideways
    Upright and laterally inverted
    Upside down and laterally inverted
  • What is the angle between the incident ray and the normal called?
    upright angle
    angle of reflection
    lateral inversion
    angle of incidence
  • What does waxing mean?
    the moon is getting bigger.
  • What is the normal?
    A line drawn at 90° to the surface where light enters.
  • What is the angle between the reflected ray and the normal called?
    refracted angle
    angle of reflection
    real angle
    angle of incidence
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