Question

Joseph studied whether different materials can block certain electromagnetic waves by testing television reception in different parts of the house. At each part of the house, Joseph used a different antenna. The experiment could have been improved by _______________________________. Question 10 options: Testing reception of a different channel during each trial. Using the same antenna during each trial. Measuring the antenna length in centimeters. Measuring the distance to the television station.

Answer 1

Joseph's experiment could be improved by using the same antenna at each part of the house during each trial instead of using different antenna. By doing so, he can obtain accurate results how is the signal in different part of the house under the same conditions (despite the location). So, he will see the dependence of the signal on the location. If he uses different antenna, than this antenna can also have influence of the signal.