Ill give brainliest pls !

light exhibits the doppler effect. what does this tell us?

select one:
a. light has properties in common with other types of waves.
b. light and sound are the same types of waves.
c. light changes speed as we approach the source.
d. light is visible only under certain conditions.

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90