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2.1 Light cone conception and its implication for sensory perception
Stephen Hawking in his book "A Brief History of Time"  has summarized the light cone concept to understand time dimension (Figure 1). The figure represents the basic conception of a "space-time conception" rather than time conception that was viewed by many thinkers of the nineteenth century, wherein space is represented in two dimensions and time is represented in the direction. Based on the light rays travelling from the origin of the event in time, a light cone is visualized that conveys the information that future events of an event can be visualized within the light cone and all events that are not related to the event are outside the future light cone (see Figure 2). As shown, the future light cone of A refers to all events that are related to the event A. However, it can be observed that an event E that is not casually related to A is located outside the future and past light cones of the event.
...light cone conception... conveys the basic limitation of sensory percpetion due to time dimension and its effect on conscious observation.
The light cone conception as explained by Minowski-Einstein model  has implications towards our understanding of the universe based on time dimensional phenomena. Since Earth is located far away from Sun, any event that occurs at Sun can be understood by living beings at Sun only after 8 minutes and 30 seconds from the event. In other words, an event such as death of Sun can be observed by us on Earth only after 8 minutes and 30 seconds due to our entering the light cone of the event after the said amount of time. Similarly, knowledge about distant galaxies based on the light that is received from them would also have similar limitations. For those galaxies that are distantly located in the universe, the light would have left some millions of years ago, before it could reach Earth. Therefore, based on light cone concept, one can only see what has happened in the past in the Universe and one cannot know what is happening at this moment at the farthest place in the Universe. From a philosophical point of view, light cone conception and its application to understand the nature conveys the basic limitation of sensory perception due to time dimension and its effect on conscious observation.