light rays science

• What is the speed of light: 

  300,000,000 
• What is light:

  Light is the electromagnetic radiation that can be seen by humans.
• How is light produced: 

  Light is produced by luminous objects = light objects.
• Incident Ray: the start of where light hits the mirror.
• The angle of incidence: The angle where the light bounces off the mirror. 
• The angle of reflection: The angle of light that bounces off the mirror 
• Normal: the line between the angle of incidence and the angle of reflection.
• Side note: The angle of incidence is the same as the angle of reflection in a plane/flat mirror.
• Concave mirror: The mirror that is going in
• 3 Concave mirror rules

  -Focus if light hits the focus point it always parallel to the principal axis

  -If the light is parallel to the principal of the axis it will always hit the focus point

  -If light hits the centre of curvature it will come back the same angle

  -If light hits the vertex it will reflect the same angle 
• Convex mirror: The mirror that is going out
• 3 rules of the convex mirror

  -If the light is parallel to the principal axis it will always be the same as the focus point pointing back. 

  -If light hits the centre of curvature it will come back at the same angle

  -Same angle point back
• The Law of Reflection:

  The angle of incidence is the same as the angle of reflection(Only on plane mirrors) 

  Incident ray, reflected ray, and normal ray are all in the same area.
• Salt stands for:

  -S (Larger, Same size, Smaller)

  -A (Upright or Inverted) 

  -L (Behind or in front of mirror) 

  -T (Real, Virtual, No clear image)
• Real Image:

  A real image is when reflected rays intersect.
• Virtual Image: 

  When reflected rays do not intersect, it create a fake image in the mirror for our brain.
• How many rays to tell where the image is: 

  2
• SALT of Convex.

  Convex mirrors will always be

  S- Smallar

  A- Upright

  L- Behind the mirror 

  T- Virtual
• Types of light that can be produced? 

  Incandescence light (Light produced at high temperatures. (I.e lightbulb.)

  Lazer (High temperatures to create an accurate light) 

  Bioluminescence (light produced by a living organism.)

  LED (Electric currents) 

  Chemiluminescence (Light created by a chemical reaction)
• Visible light is made of 7 colors 
• The colours that make up light are Red, Orange, Yellow, Green, Blue, Indigo, and Violet. 
• The electromagnetic waves from low to high

  Radio waves, microwaves, infrared light, visible light, ultraviolet light, x-rays, and gamma rays.