Reflection
Lenses
Refraction
Test Your Luck
General Knowledge
100
A line that is at Right Angles to the surface
Normal Line
100
Lenses use this idea to bend light waves?
Refraction.
100
Refraction is the ............. of waves?
bending
100
Light travels in?
Straight lines.
100
What is the difference between: a) Transparent b) Translucent c) Opaque
a) Lets all light through b) Lets some of the light through c) Does not allow any light through
200
State the Law of Reflection
The angle of incidence is always equal to the angle of reflection.
200
Lens with the thickest part in the middle?
Convex or Converging Lens.
200
Refraction of light is caused by?
1. Light passing from one medium to another. 2. Slowing of speed of light.
200
Speed of Light?
300,000,000 m/s
200
What is the Light Spectrum?
White light that has refracted into the colours of the rainbow.
300
Why is lettering on the front of some vehicles written backwards?
So it can be easily read through a mirror.
300
Lens with the thinest part in the middle?
Concave or Diverging Lens.
300
Incident angle at which neither reflection nor refraction takes place?
Critical angle.
300
Light is what type of wave?
Transverse wave.
300
What is Light?
Light is a form of energy and is part of the Electromagnetic Spectrum seen to us as visible light.
400
The type of image formed by a plain mirror?
Virtual Image.
400
Location where parallel rays of light that passed through a lens converge?
Focal Point.
400
Only reflection from a medium, no refraction?
Total Internal Reflection.
400
When light hits a rough surface and is reflected in many different directions?
Scatter.
400
What are the Primary Colours?
Red, Blue, Green.
500
You are standing 5Ft away from a plain mirror, how far away is the image?
10ft
500
Why are lenses needed in cameras?
To focus on an object.
500
Different mediums bend light differently?
Refractive Index.
500
Name 2 things that happen to white light in water droplets to create a rainbow
Reflection and Diffuse of light into colours.
500
What are the colours of the rainbow?
Red, Orange, Yellow, Green, Blue, Indigo, Violet.
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