Question

Which of the following are types of light pollution?

• A. Glare
• B. Sky glow
• C. Light trespass
• D. All of above

Answer 1

The correct option is D All of above

All are types of light pollution.
Sky glow:
This is the bright orange-pink glow that hangs over cities and towns in the night. Sky glow could be caused by natural factors, but also often caused by inefficient and artificial lights shining needlessly into the sky, and further scattered by airborne dust particles, gas and water droplets
Glare:
This is the effect produced when the eyes are exposed to bright light. If a bright flashlight is directed at your face in a dark place, you notice that it almost blinds you and suddenly you cannot see other objects or shadows around you.
Light Trespass:
This occurs when the light goes over its intended range. Think of your neighbour's security light shining through your bedroom windows and lighting up your room all night.