In a ray diagram, a normal is a line drawn at .......
  • 180° to the mirror's surface
  • 45° to the mirror's surface
  • 60° to the mirror's surface
  • 90° to the mirror's surface
Light travels .......
  • Fastest in a vacuum
  • Fastest in air
  • Fastest in water
  • Slower than sound
Which of the following is translucent?
  • A mirror
  • Air
  • Greaseproof paper
  • The moon
Light can travel through .......
  • A luminous material
  • A mirror
  • A translucent material
  • An opaque material
Light travels in .......
  • Circular lines
  • Straight lines
  • Wavy lines
  • Zig zag lines
In a flat mirror, the angle of incidence is equal to .......
  • The angle of emergence
  • The angle of reflection
  • The angle of refraction
  • The angle of transmission
Objects with a smooth surface give .......
  • Diffuse reflection
  • Irregular reflection
  • No reflection
  • Regular reflection
Which of the following is NOT luminous?
  • A burning candle
  • A car headlight (switched on)
  • The moon
  • The sun
We can see objects because .......
  • Our eyes give out light
  • They bend light into our eyes
  • They reflect light into our eyes
  • They shine light into our eyes
We usually look at our reflection in a flat mirror. This type of mirror is a .......
  • Bi-concave mirror
  • Concave mirror
  • Convex mirror
  • Plane mirror
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