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KS3 Light

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  • How are light rays drawn?
    A straight line drawn with a ruler and arrow to indicate direction
  • Which type of reflection does this image represent?
    Specular
  • Glass is an example of which type of surface?
    Transparent
    Translucent
    Opaque
  • What type of a wave is light?
    Transverse
    Longitudinal
    Mexican
  • Derek the raver goes to a disco wearing blue trainers, what colour do they look in blue light? Why?
    Blue, blue objects reflect blue light
  • What is B?
    The normal
  • What is the relationship between angle of incidence and angle of refraction?
    They are not equal, but when you increase angle of incidence, the light refracts more, so higher angle of refraction
  • What is 'i'?
    Angle of incidence
  • Which waves on the EM spectrum have a longer wavelength than Infrared?
    Radio and microwaves
  • What is 'r'?
    Angle of reflection
  • Red light has the lowest energy, does it have the longest or shortest wavelength?
    Longest
  • Wood is an example of which type of surface?
    Translucent
    Transparent
    Opaque
  • What happens to light when it goes from a gas through a solid?
    Denser medium, slows down, changes direction (refraction)
  • What is A?
    Incident ray
  • Which wave on the EM spectrum can be used in thermal cameras to identify people in the dark?
    Infrared
  • What is C?
    Reflected ray
  • Which wave on the EM spectrum can be used to identify broken bones?
    X-rays
  • What is the law of reflection?
    The law of reflection states that: angle of incidence i = angle of reflection r.
  • Derek the raver goes to a disco a red hat, what colour does it look in blue light? Why?
    Black, red hat absorbs blue light
  • What are the three primary colours?
    Blue, Red, Yellow
  • Which wave on the EM spectrum has the highest energy?
    Gamma
  • Red light has the longest wavelength, does it refract the least or the most?
    Least
  • Which type of reflection does this image represent?
    Diffuse
  • What happens to light when it hits a translucent surface?
    Rays of light are scattered, only some passes through
  • What is the speed of light in air?
    300 000 000 m/s
  • Which wave on the EM spectrum can cause skin to tan or burn?
    Ultraviolet
  • Violet light has the shortest wavelength, does it have the highest or lowest energy?
    Highest
  • Name one property of a mirror image
    Appears to be behind mirror/correct way up/inverted
  • Frosted glass (e.g., bathroom window) is an example of which type of surface?
    Opaque
    Translucent
    Transparent
  • What happens to light when it hits an opaque surface?
    Light will be absorbed or reflected
  • What happens to light when it hits a transparent surface?
    It passes straight through
  • Derek the raver goes to a disco wearing white gloves, what colour do they look in green light? Why?
    Green, white gloves reflect green light