Several factors can affect braking distance in a motor vehicle.
Speed, the faster you are travelling means a longer braking distance.
Drivers reaction time, the road surface, efficiency of the brakes, efficiency of the tyres, and any combination of these factors.
The steeper the slope, the longer the stopping distance is.
If the lens are thicker it affects the image distance.
Yes, friction affects stopping distance. The greater the friction the lower the stopping distance; the lower the friction the greater the stopping distance.
the distance between the lenses
If the lens are thicker it affects the image distance.
The steeper the slope, the longer the stopping distance is.
If the lens are thicker it affects the image distance.
Mass and distance of separation.
Reaction time AND breaking distance
A star distance from earth
I cannot say about "lenght", but distance is a measure of length so length affects distance. Speed is the rate of change of distance (over time) so length affects speed. Mass does not significantly affect speed or distance but, because they are affected by acceleration and acceleration is affected by mass (for a given force), then mass affects them. Also, mass affects space time and the presence or absence of mass changes the lines along which distances are measured and so distances and speed are affected.
Yes, friction affects stopping distance. The greater the friction the lower the stopping distance; the lower the friction the greater the stopping distance.
the distance between the lenses
it is the gravity affects the weight
relative "brightness" is based on distance, size, and temperature
As a rough - not absolute - measure, yes, that is correct
It doesn't. Mass and distance affects the force of gravity.