2. Carla's favorite ball is bright blue when it is outside in the direct sunlight. Inside, the ball

appears to be almost green. Why does Carla's ball seem to change colors?

A. Color is determined by the density of an object, and Carla's ball became more dense when

she went inside out of the sunlight.

B. Color is determined by the size of an object, and Carla's ball lost air while being played

with, so it was smaller when she went inside.

C. Color is determined by the wavelength of light reflected or absorbed by the object, and the

light changed when Carla went inside.

D. Color is determined by the temperature of an object, and the temperature changed when

Carla went inside out of the sunlight.

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.