Show:
Characteristics of Light.
How we see colour.
Mirrors.
Refraction.
Lenses.
100
What is light?
A form of radiant energy that the eye can detect.
100
True / False: Transparent is when light can't go through the object.
False.
100
Define the meaning of a ray.
Straight line that shows the direction of the light waves.
100
What is the angle of refraction?
Angle between refracted ray and the normal.
100
Types of Lens.
Concave and Convex Lenses.
200
List two sources of light related to heat.
Sun & Candles.
200
List the additive primary colours.
Red, Green & Blue.
200
What is the law of reflection?
Angle of Incidence equals to Angle of Reflection.
200
Define the term Total Internal Reflection.
Light can no escape from the substance so bounces back and froth.
200
True / False: Lenses have two focal points.
True.
300
List two uses of Fluorescence lighting.
Health care & Forensic Investigators.
300
List the complementary colours.
Red & Cyan. Green & Magenta. Blue & Yellow.
300
Define the term Virtual Image.
An image located where no light rays ever meet.
300
Use of Internal Reflection.
Optical Fibres (Fibre Optics).
300
Centre of the image is called?
Optical Centre.
400
What are fluorescent light?
Electric Discharge Tubes.
400
Combining White - (Cyan + Yellow) gives out?
Blue.
400
True / False: Images in the plane mirrors are always true.
False.
400
Angle of incidence is larger than angle of refraction is? : a) Small. b) Large. c) Equal.
b) Large.
400
If the size of the image is bigger beyond the focal point, the attitude is?
The attitude is upside down.