What would the electric field look like in a system with two parallel positively charged planes with equal charge densities?

Ared apple is illuminated by a blue light the apple will appear

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Suppose two stars are located in region a of the h-r diagram shown in the figure below. star c appears much dimmer than star y as seen from earth. which star can be inferred to be nearer to earth and how do you know?