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Light

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  • water is ......................... medium than air
    more
  • Mention 4 examples sources of light
    Sun, Bulb, Flash Light, Fire
  • When the light strikes from water to the air, it will bend .................... to the normal
    Far away
  • What happen with the shadow if we move the object close to the source of light?
    become bigger
  • When the light strikes from air to the glass, it will bend .................... to the normal
    towards
  • what is the example of refraction of light?
    when you put a pencil in a glass of water, it look like bend
  • Which colours of light are reflected by a black object??
    No colours of light are reflected by a black object.
  • What is dispersion?
    The splitting up white colour into 7 separate colours
  • What is the name of the object that not allowed the light to pass?
    Opaque
  • Mention the colour of rainbow
    ROYGBIV
  • What is the name of the object that allow the light to pass?
    Transparent
  • What is the transparent material that causes rainbow?
    raindrop/water
  • How light travels?
    In a straight line
  • Mention 2 examples of non-luminous object
    Table, book
  • Why you can see a moon at the night??
    Because the moon is reflected the light from the sun
  • Which colour is refracted most as it passes through the prism?
    Violet
  • Mention the example of rough surface
    paper, stone
  • Which colour is refracted least?
    red
  • Which two filters, if placed together, would absorb all colours of light?
    Red and green or red and blue would absorb all colours.
  • What is luminous object?
    object that can emits the light
  • Which colours can pass through a blue filter? Which colours are absorbed?
    Green, blue and indigo/violet are transmitted; red, orange and yellow are absorbed.
  • The angle of incidence is always ................... to the angle of reflection
    equal/ same
  • What happen with the shadow if we move the object far away from the source of light?
    Become smaller
  • water is ......................... medium than glass
    Less
  • Explain why it looks green when white light shines on it. Use the words “reflected” and “absorbed” in your explanation.
    The postbox looks green because red light is reflected by its paint. All other colours contained in white light are absorbed by the green paint.
  • The name of angle that make between normal line and reflected ray?
    the angle of reflection
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