1) The two main factors that affect body lighting are a) Color and brightness b) Distance and hardness c) Hardness and color d) Distance and brightness 2) The rate of visible light emission of an object is ؟ يسمى ما لجسم املرئي الضوء انبعاث معدل called? a) Illumination. b) Lighting c) Luminous flux d) Frequency flow 3) The rate of incidence of light on the surface of a ؟ يسمى الجسم سطح على الضوء سقوط معدل body is called? a) Travels b) Illumination c) Luminous flux d) Lighting 4) The medium that allows light to pass through but now allows the light source to appear is? a) The violator b) Semi-transparent c) The dark one d) Transparent 5) Sources that emit light from themselves and appear visible, such as the sun, are called? a) Luminous sources b) Polarized sources c) Linear sources d) The violator 6) What is the rate of light emission from a light source called? a) Luminous flux b) Glow of light c) Illumination d) Lighting intensity 7) The luminous flux that falls on an area of (1m^2) of the inner surface of a sphere with a radius of (1m) is called? a) Lighting intensity b) Photoemission c) Lamp capacity d) Illumination 8) What is light ?   a) B. Electric waves  b) Electric conduction c) Electromagnetic radiation d) Longitudinal waves 9) Windows in a home usually give a clear view of what is outside. Which term describes this type of window? a) translucent b) transparent c) opaque d) transopaque 10) Based on the following equation: E=x/(4πr^2) What does the symbol (x) represent and what is its unit of measurement? a) Illumination, Lux b) Illumination, lumens c) Luminous flux, lux d) Luminous flux, lumens

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