It will take years, for photons (light ) to get to the surface from the core of the sun, but only a few minutes to travel to earth from the surface

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It will take years, for photons (light ) to get to the surface from the core of the sun, but only a few minutes to travel to earth from the surface.
Do you know why this happens..???
This is because the core of the sun is soo dense that even the photon (light ) has to struggle to get out of it.
The core of the sun is about 150 g/cm3 (gram per centimeter cube  ), i.e. about 150 times greater than the density of water which also increases the gravitational pressure of the sun. 
As we know Nuclear fusion reaction takes place inside the sun due to which we get the light energy i.e. the photons, and if you are a science student you might know that nuclear reactions are a chain reaction that repeats itself numerous times. 
And as it repeats itself the direction of the reaction is never fixed.
That means once the photon gets into the nuclear fusion reaction, it again gets stuck into the chain reaction number of times and the reaction goes on again and again.
Where the direction of the reaction can go away or go towards the direction of the previous reaction.
Thus it takes a lot of time sometimes years (sometimes nearly 0.2 million years) for the photon or light to reach the sun’s surface from the core.
Whereas from the sun’s surface to the earth, the photon has to travel through a vacuum, which means space.
Thus it takes only about 8 min. 20 sec. for light to get to earth from the sun.

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