light

Cards (31)

  • What happens to light as it travels?

    It reflects off objects and into your eye
  • How do you see a book?
    Light reflects off the book into your eye
  • What is a luminous object?
    An object that emits light
  • Why can you see most objects?
    They reflect light into your eyes
  • What happens to light when you look through a window?
    Light travels through the glass
  • What does it mean for a material to be transparent?
    Most light passes through it
  • What happens to light in very deep water?
    Most of the light is absorbed
  • What are translucent materials?
    They scatter light but allow some through
  • What do opaque materials do to light?
    They do not transmit light
  • What do opaque materials produce?
    Shadows
  • Why can you predict the size and shape of shadows?
    Because light travels in straight lines
  • What is the law of reflection?
    The angle of incidence equals the angle of reflection
  • What is an incident ray?
    The ray that strikes the mirror
  • What is the normal line in reflection?
    An imaginary line at 90° to the mirror
  • How do you measure angles in reflection?
    From the normal to the rays of light
  • What happens when light is reflected from a mirror?
    The angle of incidence equals the angle of reflection
  • What does a prism do to white light?
    It splits it into a spectrum
  • What is dispersion?
    Splitting white light into a spectrum
  • Why does violet light refract more than red light?
    It has a higher frequency
  • How many colors make up white light?
    Seven different colors
  • What does a red filter do to white light?
    It transmits red light and absorbs others
  • What happens when you put a red and green filter together?
    No light would get through
  • Why do objects appear different colors?
    They reflect their color and absorb others
  • What do black objects do with colors?
    They absorb all colors
  • What do white objects do with colors?
    They reflect all colors
  • What happens when light is absorbed by a material?
    The material heats up
  • How does your eye perceive no light?
    As black
  • How does your eye perceive all frequencies of light?
    As white
  • What does an apple do with red light?
    It reflects red light and absorbs others
  • What is the spectrum of white light?
    A continuous range of colors
  • What is the relationship between frequency and refraction?
    Higher frequency light is refracted more