User:SaurZ

The emission of light by the Sun seems to be a very simple phenomena. But it is not as simple as it seems. The photon particle that striked to your nose, was 8 minutes and 20 seconds old, as light takes nearly 500 seconds to travel from Sun to earth, but it is not actually what the reality is.

The photon particles travel from the centre of the Sun to its surface, before they are released out, and this takes millions of years for them. Not because Sun's radius is much greater, this is because, the inner core of the Sun is too dense, and it makes the movement of the photons even more complex and difficult.

However, the speed of photons does not reduce here. The actual reason behind the delay is the continuous collision of the photons with the particles of the Sun itself, which do not let the photons pass through them. This keeps changing the direction of the photons continuously, and thus it takes millions of years for the photons to go through this.

We now understand that the light which Sun emmits is millions of years old. But it is also true, that each photon does not take the same time for reaching to the surface of the Sun, from its centre. So, if two photons start their journey at point A inside the core of the Sun, and end their journey at point B, the change in time taken by these particles might be zero seconds, one minute, or even millions of years.

It means that, if an incidence occurs on the sun at any particular point on the surface, it will not be seen at the same time, but in parts, because the photons that started travelling from their initial positions at the same time, are now having a great time difference in their movement. So if two particles pass from that point with a time difference of 2 days, you will have to wait for two days to witness the whole incident.

It seems a preety cool phenomena but, it is not true. When a particle passes through the Sun's surface, no matter when it started travelling, it will strike to the observer's eye along with another photon which was emitted along with it.

So, it does not matter whether two particles started travelling at the same time from the centre of the Sun or not. What matters is, two photons must be emitted at the same time from the Surface of the Sun to produce a clear image of the incident.

So, you will always see an 8 minutes, 20 seconds old Sun, no matter with which frame you aree seeing it.