COMPUTER NETWORKS AND COMMUNICATIONS
WIRELESS COMMUNICATION TECHNOLOGIES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Large buildings, earth surface and objects with large surface area
|
|
|
Obstacles with dimensions in order of wavelength
|
|
|
Surfaces with rough textures such as Foliage, lamp posts, street signs, walking pedestrian, etc.
|
|
|
None of the above
|
Detailed explanation-1: -Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface.
Detailed explanation-2: -The reflectivity of a surface is referred to as its albedo. Albedo is expressed as a percentage of radiation that is reflected.
Detailed explanation-3: -The reflecting power of a surface is known as ‘albedo’. Bright snow and ice have a high albedo, meaning they reflect solar radiation back into space, while green areas like forests and fields have a much lower albedo. The lower the albedo, the more energy from the Sun is absorbed.
Detailed explanation-4: -Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface.