Can the sun damage the camera sensor? Under what conditions?
Take a look at the photos in the 2nd link.
Yes, you can damage the camera but you'll have to work at it.
Day to day will be fine. When you start getting into long lenses and deliberately framing the sun in the shot (or making it the ...
That's just the nature of fractions. 5/4 (1.25) is the reciprocal of 4/5 (0.80).
1.25 - 1 = 0.25 = 25%
1 - 0.80 = 0.20 = 20%
5.95µ is 25% greater than 4.76µ
4.76µ is 20% smaller than 5.95µ
So whether the difference is 20% or 25% all depends upon which of the two numbers you select as the baseline, the larger one or the smaller one.
The numbers for area are ...
Your math is incorrect; if you divide 4.76um by the 1.19um difference the result is 4... i.e. you would have to enlarge the NEX spec by 25% to get the D610 spec. Same with the pixel area spec.
Pixel pitch, area, and density are all just different ways of saying the same thing; pixel size.